pull up r22278 from trunk

pull up r22278 from trunk

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 r22278 | ghudson | 2009-04-24 15:49:54 -0400 (Fri, 24 Apr 2009) | 9 lines
 Changed paths:
    M /trunk/src/lib/krb5/keytab/kt_file.c

 ticket: 6475
 status: open
 tags: pullup
 target_version: 1.7

 In krb5_ktfileint_find_slot, don't continue the loop when we find a
 final zero-length buffer.  This is a minimal fix intended to be pulled
 up to the 1.7 branch; a code cleanup commit will follow.

ticket: 6475
version_fixed: 1.7

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-7@22328 dc483132-0cff-0310-8789-dd5450dbe970