[krbdev.mit.edu #6377] SVN Commit

[Ken Raeburn via RT]

Fix one more case of an explicit null check before calling a free
function that does the null check.

Also, use krb5_free_keyblock_contents instead of open-coding all the
work (and not trying hard enough to clear the memory).

http://src.mit.edu/fisheye/changelog/krb5/?cs=21926
Commit By: raeburn
Revision: 21926
Changed Files:
U   trunk/src/lib/krb5/krb/kfree.c