git-svn-id: svn://192.168.3.15/activex/AVS/Sources/TeamlabOffice/trunk/OfficeWeb@47921 954022d7-b5bf-4e40-9824-e11837661b57

PowerPoint/Drawing/Transitions.js

@@ -2849,10 +2849,10 @@ function CDemonstrationManager(htmlpage)
 
     this.OnPaintSlide = function(is_clear_overlay)
     {
-        if (is_clear_overlay)
+        if (is_clear_overlay && oThis.Overlay)
         {
             var _ctx2 = oThis.Overlay.getContext('2d');
-            _ctx2.clearRect(oThis.Transition.Rect.x, oThis.Transition.Rect.y, oThis.Transition.Rect.w, oThis.Transition.Rect.r);
+            _ctx2.clearRect(oThis.Transition.Rect.x, oThis.Transition.Rect.y, oThis.Transition.Rect.w, oThis.Transition.Rect.h);
         }
 
         oThis.Transition.CalculateRectDemonstration();