krb5 commit [krb5-1.16]: Fix memory leak in 'none' replay cache type

[Greg Hudson]

https://github.com/krb5/krb5/commit/7ef6c40e007a3857ac484fbb14fbad6f5f86d9e9
commit 7ef6c40e007a3857ac484fbb14fbad6f5f86d9e9
Author: Corene Casper <C.Casper at Dell.com>
Date:   Sat Feb 16 00:49:26 2019 -0500

    Fix memory leak in 'none' replay cache type
    
    Commit 0f06098e2ab419d02e89a1ca6bc9f2828f6bdb1e fixed part of a memory
    leak in the 'none' replay cache type by freeing the outer container,
    but we also need to free the mutex.
    
    [ghudson at mit.edu: wrote commit message]
    
    (cherry picked from commit af2a3115cb8feb5174151b4b40223ae45aa9db17)
    
    ticket: 8783
    version_fixed: 1.16.4

 src/lib/krb5/rcache/rc_none.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/lib/krb5/rcache/rc_none.c b/src/lib/krb5/rcache/rc_none.c
index e30aed0..0b2274d 100644
--- a/src/lib/krb5/rcache/rc_none.c
+++ b/src/lib/krb5/rcache/rc_none.c
@@ -50,6 +50,7 @@ krb5_rc_none_noargs(krb5_context ctx, krb5_rcache rc)
 static krb5_error_code KRB5_CALLCONV
 krb5_rc_none_close(krb5_context ctx, krb5_rcache rc)
 {
+    k5_mutex_destroy(&rc->lock);
     free (rc);
     return 0;
 }