Bug 691725. Actually initialize the mIsDragPopup member of nsWidgetInitData. r=enn

widget/public/nsWidgetInitData.h

@@ -132,7 +132,8 @@ struct nsWidgetInitData {
       mListenForResizes(PR_FALSE),
       mUnicode(PR_TRUE),
       mRTL(PR_FALSE),
-      mNoAutoHide(PR_FALSE)
+      mNoAutoHide(PR_FALSE),
+      mIsDragPopup(PR_FALSE)
   {
   }