Fix bugs

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@33597 15284696-431f-4ddb-bdfa-cd5b030d7da7

scripts/v.db.renamecol/v.db.renamecol.py

@@ -52,8 +52,6 @@ import sys
 import os
 import grass
 
-def error():
-
 def main():
     map = options['map']
     layer = options['layer']
@@ -80,7 +78,7 @@ def main():
     oldcol = cols[0]
     newcol = cols[1]
 
-    if $driver == "dbf":
+    if driver == "dbf":
 	if len(newcol) > 10:
 	    grass.fatal("Column name <%s> too long. The DBF driver supports column names not longer than 10 characters" % newcol)