tree 6d170f0d5d8de8670e9ed1d500380662f8bdb069
parent 122f2fc5739c1ba9967775581201eefece855602
author Stephen Hemminger <shemming@brocade.com> 1437500994 -0700
committer Stephen Hemminger <shemming@brocade.com> 1437500994 -0700

remove unnecessary checks for NULL before free

Since free(NULL) is a no-op, it is safe to remove unnecesary
if checks.