Bug 753118 - Fix uninitialized value in nsWindow::Destroy. r=karlt

widget/gtk2/nsDragService.cpp

@@ -137,7 +137,8 @@ invisibleSourceDragDataGet(GtkWidget        *aWidget,
                            gpointer          aData);
 
 nsDragService::nsDragService()
-    : mTaskSource(0)
+    : mScheduledTask(eDragTaskNone)
+    , mTaskSource(0)
 {
     // We have to destroy the hidden widget before the event loop stops
     // running.