wxGUI vnet tool: fix icon import

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@60521 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/vnet/toolbars.py

@@ -19,7 +19,7 @@ This program is free software under the GNU General Public License
 
 import wx
 
-from icon              import MetaIcon
+from icons.icon        import MetaIcon
 from gui_core.toolbars import BaseToolbar, BaseIcons
 from core.gcmd         import RunCommand
 from core.utils import _