v.db.dropcolumn: fix find_file() call

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@63895 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/v.db.dropcolumn/v.db.dropcolumn.py

@@ -52,7 +52,7 @@ def main():
     mapset = grass.gisenv()['MAPSET']
     
     # does map exist in CURRENT mapset?
-    if not grass.find_file(map, element = 'vector', mapset = mapset):
+    if not grass.find_file(map, element = 'vector', mapset = mapset)['file']:
         grass.fatal(_("Vector map <%s> not found in current mapset") % map)
     
     f = grass.vector_layer_db(map, layer)