Use correct layer when adding columns to table

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@56284 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/v.rast.stats/v.rast.stats.py

@@ -191,7 +191,7 @@ def main():
 
     if addcols:
 	grass.verbose(_("Adding columns '%s'") % addcols)
-	if grass.run_command('v.db.addcolumn', map = vector, columns = addcols) != 0:
+	if grass.run_command('v.db.addcolumn', map = vector, columns = addcols, layer=layer) != 0:
 	    grass.fatal(_("Adding columns failed. Exiting."))
 
     # calculate statistics: