set GRASS_WXBUNDLED for bundling wxpython (from dev6 https://trac.osgeo.org/grass/changeset/36283)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@36284 15284696-431f-4ddb-bdfa-cd5b030d7da7

macosx/app/grass.sh.in

@@ -126,6 +126,8 @@ fi # X11
 ### end X11 block
 
 # set PYTHONPATH for GUI when bundling wxpython
+GRASS_WXBUNDLED=
+export GRASS_WXBUNDLED
 if [ -d "$GISBASE/etc/wxpython" ] && [ "$GRASS_WXBUNDLED" = "1" ] ; then
 if [ "$PYTHONPATH" ] ; then
 	PYTHONPATH="$GISBASE/etc/wxpython:$PYTHONPATH"