add podId to zoom event

bigbluebutton-client/src/org/bigbluebutton/modules/present/ui/views/SlideView.mxml

@@ -283,6 +283,7 @@ with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
 									
 			private function notifyOthersOfZoomEvent():void {
 				var presentEvent:PresenterCommands = new PresenterCommands(PresenterCommands.ZOOM);
+				presentEvent.podId = this.podId;
 				presentEvent.xOffset = slideModel.viewedRegionX;
 				presentEvent.yOffset = slideModel.viewedRegionY;
 				presentEvent.slideToCanvasWidthRatio = slideModel.viewedRegionW;