Bug 1179632 part.3 TabParent::RecvEndIMEComposition() shouldn't return true with aNoCompositionEvent when there is no widget r=smaug

dom/ipc/TabParent.cpp

@@ -2327,6 +2327,7 @@ TabParent::RecvEndIMEComposition(const bool& aCancel,
 {
   nsCOMPtr<nsIWidget> widget = GetWidget();
   if (!widget) {
+    *aNoCompositionEvent = false;
     return true;
   }
   *aNoCompositionEvent =