Fix for #726 (double deletion of active editing map tool)

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@7125 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/plugins/grass/qgsgrassedit.cpp

@@ -964,10 +964,6 @@ void QgsGrassEdit::closeEdit(void)
   std::cerr << "QgsGrassEdit::close()" << std::endl;
 #endif
 
-  // grass edit tool would become invalid
-  // ...delete it, it will notify map canvas
-  delete mCanvas->mapTool();
-
   // Disconnect signals
   // Warning: it seems that slots (postRender) can be called even 
   //          after disconnect (is it a queue?)