EditableText.detectPossibleSelectionChange(): Gracefully handle the c…

…ase where initAutoSelectDetection() hasn't yet been called. This isn't supposed to happen, but it might if a gainFocus event failed, etc. We were already guarding _lastSelectionPos, but not hasContentChangedSinceLastSelection. Fixes rare AttributeError exceptions for hasContentChangedSinceLastSelection.

source/editableText.py

@@ -177,7 +177,7 @@ def detectPossibleSelectionChange(self):
 		if not oldInfo:
 			# There's nothing we can do, but at least the last selection will be right next time.
 			return
-		hasContentChanged=self.hasContentChangedSinceLastSelection
+		hasContentChanged=getattr(self,'hasContentChangedSinceLastSelection',False)
 		self.hasContentChangedSinceLastSelection=False
 		speech.speakSelectionChange(oldInfo,newInfo,generalize=hasContentChanged)