[parrot/parrot] 779719: Fix arg guard. named_used_list can be NULL

[noreply at github.com]

Branch: refs/heads/master
Home:   https://github.com/parrot/parrot

Commit: 779719a008584b884d46073f1451b322eaf14907
    https://github.com/parrot/parrot/commit/779719a008584b884d46073f1451b322eaf14907
Author: Vasily Chekalkin <bacek at bacek.com>
Date:   2011-01-07 (Fri, 07 Jan 2011)

Changed paths:
  M src/call/args.c

Log Message:
-----------
Fix arg guard. named_used_list can be NULL