don't confuse profile iterator in 425 princ conversion

don't confuse profile iterator in 425 princ conversion

The profile iterator code hangs onto and uses the list of names passed
in.  The krb5_425_conv_principal code reuses that array when the
iterator may still be used.

* conv_princ.c (krb5_425_conv_principal): Use separate name arrays for
the iterator and the v4_realm lookup that may be done inside the
iteration loop.

ticket: new
target_version: 1.6
tags: pullup

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@18748 dc483132-0cff-0310-8789-dd5450dbe970