wxGUI: fix typo

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@50041 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/mapdisp/mapwindow.py

@@ -1452,7 +1452,7 @@ class BufferedWindow(MapWindow, wx.Window):
         
         toolbar = self.parent.GetMapToolbar()
         
-        toolbar.Enable('zoomback', enable)
+        toolbar.Enable('zoomBack', enable)
         
         return removed