wxGUI: missed one occurrence of Get when changing the function definition in https://trac.osgeo.org/grass/changeset/63544 (merge from trunk, https://trac.osgeo.org/grass/changeset/63691)

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@63692 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/vdigit/toolbars.py

@@ -865,7 +865,7 @@ class VDigitToolbar(BaseToolbar):
         # unset background map if needed
         if mapLayer:
             if UserSettings.Get(group = 'vdigit', key = 'bgmap',
-                                subkey = 'value', internal = True) == mapLayer.GetName():
+                                subkey = 'value', settings_type='internal') == mapLayer.GetName():
                 UserSettings.Set(group = 'vdigit', key = 'bgmap',
                                  subkey='value', value='', settings_type='internal')