[CORE] exit when we can't load the UI

amsn2/core/amsn.py

@@ -67,19 +67,17 @@ def __init__(self, options):
         self._gui = None
         self._loop = None
         self._main = None
+        self._account = None
         self.loadUI(self._options.front_end)
 
         self._backend_manager = aMSNBackendManager(self)
         self._account_manager = aMSNAccountManager(self, options)
-        self._account = None
         self._theme_manager = aMSNThemeManager(self)
         self._contactlist_manager = aMSNContactListManager(self)
         self._oim_manager = aMSNOIMManager(self)
         self._conversation_manager = aMSNConversationManager(self)
         self._personalinfo_manager = aMSNPersonalInfoManager(self)
 
-
-
         # TODO: redirect the logs somewhere, something like ctrl-s ctrl-d for amsn-0.9x
         logging.basicConfig(level=logging.WARNING)
 
@@ -105,6 +103,9 @@ def loadUI(self, ui_name):
 
         self._gui_name = ui_name
         self._gui = gui.GUIManager(self, self._gui_name)
+        if not self._gui.gui:
+            print "Unable to load UI %s" %(self._gui_name,)
+            self.quit()
         self._loop = self._gui.gui.aMSNMainLoop(self)
         self._main = self._gui.gui.aMSNMainWindow(self)
         self._skin_manager = self._gui.gui.SkinManager(self)
@@ -211,10 +212,12 @@ def timerAdd(self, delay, func):
         self._loop.timerAdd(delay, func)
 
     def quit(self):
-        if self._account is not None:
+        if self._account:
             self._account.signOut()
-        self._loop.quit()
+        if self._loop:
+            self._loop.quit()
         logging.shutdown()
+        exit(0)
 
     # TODO: move to UImanager
     def addContact(self):