NPE when selection run config options without selecting the source file first

[HannahSchellekens]

Description

Exception occurs when selecting other options in run configurations when the source file hasn't been selected.

Stacktrace

null
java.lang.NullPointerException
	at nl.rubensten.texifyidea.run.LatexRunConfiguration.isGeneratedName(LatexRunConfiguration.java:209)
	at com.intellij.execution.impl.RunConfigurable$7.stateChanged(RunConfigurable.java:440)
	at com.intellij.openapi.options.SettingsEditor.fireEditorStateChanged(SettingsEditor.java:144)
	at com.intellij.openapi.options.SettingsEditor$2.stateChanged(SettingsEditor.java:127)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.intellij.util.EventDispatcher.dispatch(EventDispatcher.java:99)
	at com.intellij.util.EventDispatcher.access$200(EventDispatcher.java:35)
	at com.intellij.util.EventDispatcher$2.invoke(EventDispatcher.java:79)
	at com.sun.proxy.$Proxy161.stateChanged(Unknown Source)
	at com.intellij.ui.UserActivityWatcher.fireUIChanged(UserActivityWatcher.java:105)
	at com.intellij.ui.UserActivityWatcher$7.itemStateChanged(UserActivityWatcher.java:111)
	at javax.swing.AbstractButton.fireItemStateChanged(AbstractButton.java:2050)
	at javax.swing.AbstractButton$Handler.itemStateChanged(AbstractButton.java:2355)
	at javax.swing.DefaultButtonModel.fireItemStateChanged(DefaultButtonModel.java:455)
	at javax.swing.JToggleButton$ToggleButtonModel.setSelected(JToggleButton.java:272)
	at javax.swing.JToggleButton$ToggleButtonModel.setPressed(JToggleButton.java:289)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
	at java.awt.Component.processMouseEvent(Component.java:6533)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
	at java.awt.Component.processEvent(Component.java:6298)
	at java.awt.Container.processEvent(Container.java:2236)
	at java.awt.Component.dispatchEventImpl(Component.java:4889)
	at java.awt.Container.dispatchEventImpl(Container.java:2294)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
	at java.awt.Container.dispatchEventImpl(Container.java:2280)
	at java.awt.Window.dispatchEventImpl(Window.java:2746)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.awt.EventQueue$4.run(EventQueue.java:731)
	at java.awt.EventQueue$4.run(EventQueue.java:729)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	at com.intellij.ide.IdeEventQueue.e(IdeEventQueue.java:821)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:645)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:365)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
	at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:184)
	at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:229)
	at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:227)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:227)
	at java.awt.Dialog.show(Dialog.java:1084)
	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:736)
	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:458)
	at com.intellij.openapi.ui.DialogWrapper.invokeShow(DialogWrapper.java:1686)
	at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1635)
	at com.intellij.execution.actions.EditRunConfigurationsAction.actionPerformed(EditRunConfigurationsAction.java:47)
	at com.intellij.openapi.actionSystem.ex.ActionUtil$1.run(ActionUtil.java:216)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:233)
	at com.intellij.ui.popup.PopupFactoryImpl$ActionPopupStep.performAction(PopupFactoryImpl.java:968)
	at com.intellij.ui.popup.PopupFactoryImpl$ActionPopupStep.performAction(PopupFactoryImpl.java:958)
	at com.intellij.ui.popup.PopupFactoryImpl$ActionPopupStep.a(PopupFactoryImpl.java:952)
	at com.intellij.openapi.application.TransactionGuardImpl.performUserActivity(TransactionGuardImpl.java:193)
	at com.intellij.ui.popup.AbstractPopup.a(AbstractPopup.java:1440)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
	at com.intellij.ide.IdeEventQueue.e(IdeEventQueue.java:821)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:649)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:365)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)