Initialize the 2 new fields of the nsSizeEvent (mWinWidth + mWinHeight) before dispatching the event. Fix a crash due to recursive calls in the sample viewer app.

widget/src/mac/nsWindow.cpp

@@ -816,6 +816,8 @@ PRBool nsWindow::ReportSizeEvent()
 
 	// nsSizeEvent
 	sizeEvent.windowSize	= &mBounds;
+	sizeEvent.mWinWidth		= mBounds.width;
+	sizeEvent.mWinHeight	= mBounds.height;
   
 	// dispatch event
 	return(DispatchWindowEvent(sizeEvent));