pull up r25037 from trunk

pull up r25037 from trunk

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 r25037 | ghudson | 2011-07-22 12:56:36 -0400 (Fri, 22 Jul 2011) | 9 lines

 Fix gss_set_cred_option cred creation with no name.

 When creating a cred in the mechglue with gss_acquire_cred, the
 mechanism is allowed to return no name from gss_inquire_cred.  But in
 the analagous operation in gss_set_cred_option, that would result in
 an error from gss_display_name.  Make the call to gss_display_name
 conditional on the mechanism name being set.  Reported by Andrew
 Bartlett.

ticket: 6932
version_fixed: 1.9.2
status: resolved

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-9@25373 dc483132-0cff-0310-8789-dd5450dbe970