SANKORE-566

Interactivities:New interactivities call crash if they will be converted as tool

src/api/UBWidgetUniboardAPI.cpp

@@ -466,9 +466,12 @@ void UBWidgetUniboardAPI::sendFileMetadata(QString metaData)
 }
 
 void UBWidgetUniboardAPI::enableDropOnWidget(bool enable)
+{
+    if (mGraphicsWidget)
     {
         mGraphicsWidget->setAcceptDrops(enable);
     }
+}
 
 void UBWidgetUniboardAPI::ProcessDropEvent(QDropEvent *event)
 {