wxGUI/vdigit: fix typo in fn name (split line)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@61329 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/vdigit/wxdigit.py

@@ -972,7 +972,7 @@ class IVDigit:
         Vect_destroy_list(poList)
         
         if ret > 0:
-            self.addChangeset()
+            self._addChangeset()
             self.toolbar.EnableUndo()
         
         return ret