krb5 commit [krb5-1.13]: Fix leak in DB2 krb5_db_promote() implementation

[Tom Yu]

https://github.com/krb5/krb5/commit/ac12d2cd083484cbb125f956d57609e9a5f3174e
commit ac12d2cd083484cbb125f956d57609e9a5f3174e
Author: Greg Hudson <ghudson at mit.edu>
Date:   Tue Jun 28 18:09:35 2016 -0400

    Fix leak in DB2 krb5_db_promote() implementation
    
    In krb5_db2_merge_nra_iterator(), free the entry loaded from the
    source DB.
    
    (cherry picked from commit 0c5f74a25f226b2ea61a0ad7906a7c6605fc3533)
    
    ticket: 8442
    version_fixed: 1.13.7

 src/plugins/kdb/db2/kdb_db2.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/plugins/kdb/db2/kdb_db2.c b/src/plugins/kdb/db2/kdb_db2.c
index 1b7bc16..dd4a4f3 100644
--- a/src/plugins/kdb/db2/kdb_db2.c
+++ b/src/plugins/kdb/db2/kdb_db2.c
@@ -1399,6 +1399,7 @@ krb5_db2_merge_nra_iterator(krb5_pointer ptr, krb5_db_entry *entry)
         retval = 0;
     }
 
+    krb5_db_free_principal(nra->kcontext, s_entry);
     return retval;
 }