fix typo (see https://trac.osgeo.org/grass/changeset/43145)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@43147 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/gui_modules/nviz_tools.py

@@ -2498,7 +2498,7 @@ class NvizToolWindow(FN.FlatNotebook):
                 self.FindWindowById(self.win['light']['bright'][control]).SetValue(bval)
                 self.FindWindowById(self.win['light']['ambient'][control]).SetValue(aval)
         elif pageId == 'fringe':
-            win = self.FindWindowById(self.win['fringe']['surface'])
+            win = self.FindWindowById(self.win['fringe']['map'])
             win.SetValue(self.FindWindowById(self.win['surface']['map']).GetValue())
         
         self.Update()