MOHAWK: Do not call close on SaveLoadChooser.

This is actually always called when a dialog closes, thus manual closing is
not required. It furthermore is actually *bad* to call this from outside the
dialog's code, since it will remove the top dialog from the dialog stack and
thus mess up the GUI in case multiple dialogs are opened.

engines/mohawk/riven.cpp

@@ -723,8 +723,6 @@ void MohawkEngine_Riven::runLoadDialog() {
 	int slot = slc.runModalWithPluginAndTarget(plugin, ConfMan.getActiveDomainName());
 	if (slot >= 0)
 		loadGameState(slot);
-
-	slc.close();
 }
 
 Common::Error MohawkEngine_Riven::loadGameState(int slot) {