wxGUI: fix Windows locale problem

(merge https://trac.osgeo.org/grass/changeset/41308 from relbr64)


git-svn-id: https://svn.osgeo.org/grass/grass/trunk@41309 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/gui_modules/gcmd.py

@@ -35,6 +35,7 @@ import sys
 import time
 import errno
 import signal
+import locale
 
 import wx
 
@@ -441,7 +442,7 @@ class Command:
 
         for type, msg in self.__ProcessStdErr():
             if type == 'ERROR':
-                return unicode(msg, "utf-8")
+                return unicode(msg, locale.getdefaultlocale()[1])
 
         return ''