wxGUI: fix encoding in debug message when layer command has non ascii characters

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@69116 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/core/render.py

@@ -1312,7 +1312,7 @@ class Map(object):
 
     def SetLayers(self, layers):
         self.layers = layers
-        Debug.msg(5, "Map.SetLayers(): layers=%s" % (layers))
+        Debug.msg(5, "Map.SetLayers(): layers={}".format([EncodeString(layer.GetCmd(string=True)) for layer in layers]))
 
     def ChangeLayer(self, layer, render=False, **kargs):
         """Change map layer properties