fix Bug 32970

common/wordcopypaste.js

@@ -2747,7 +2747,9 @@ PasteProcessor.prototype =
                         case "Content":
                         {
                             var docContent = this.ReadPresentationText(stream);
-							
+							if(docContent.length === 0){
+							    return;
+							}
 							var presentationSelectedContent = new PresentationSelectedContent();
 							presentationSelectedContent.DocContent = new CSelectedContent();
 							presentationSelectedContent.DocContent.Elements = docContent;

slide/Editor/Format/Presentation.js

@@ -3972,6 +3972,7 @@ CPresentation.prototype =
             }
             else if(Content.DocContent)
             {
+                if(Content.DocContent.Elements.length > 0){
                     var target_doc_content = this.Slides[this.CurPage].graphicObjects.getTargetDocContent(true), paragraph, NearPos;
                     if(target_doc_content)
                     {
@@ -3997,6 +3998,7 @@ CPresentation.prototype =
                     }
                 }
             }
+        }
     },
 
     Check_CursorMoveRight : function()