wxGUI/psmap: missing import

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@55117 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/psmap/g.gui.psmap.py

@@ -42,6 +42,7 @@ import grass.script as grass
 
 sys.path.append(os.path.join(os.environ['GISBASE'], "etc", "gui", "wxpython"))
 
+from core.globalvar import CheckWxVersion
 from psmap.frame        import PsMapFrame
 from psmap.instructions import Instruction