Allow vector line widths to be set to 0 at a minimum

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@40999 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/gui_modules/nviz_tools.py

@@ -653,7 +653,7 @@ class NvizToolWindow(wx.Frame):
 
         width = wx.SpinCtrl(parent=panel, id=wx.ID_ANY, size=(65, -1),
                             initial=1,
-                            min=1,
+                            min=0,
                             max=100)
         width.SetValue(1)
         self.win['vector']['lines']['width'] = width.GetId()