krb5 commit: Initialize err variable in krb5_sendto_kdc

[Greg Hudson]

https://github.com/krb5/krb5/commit/1ed3f68c2394fbb48731bba4e4e9a60c8b925ca5
commit 1ed3f68c2394fbb48731bba4e4e9a60c8b925ca5
Author: Nalin Dahyabhai <nalin at dahyabhai.net>
Date:   Tue Mar 11 13:26:32 2014 -0400

    Initialize err variable in krb5_sendto_kdc
    
    When we get an KRB5_KDC_UNREACH error back from k5_sendto, we check if
    the err variable we passed for use by our message handler has been set
    to KDC_ERR_SVC_UNAVAILABLE.  If k5_sendto doesn't receive any
    response, though, the handler isn't called, so we're reading an
    uninitialized variable.  Initialize it to a value other than
    KDC_ERR_SVC_UNAVAILABLE to be sure.
    
    [ghudson at mit.edu: initialize err just before calling k5_sendto; edit
    commit message]
    
    ticket: 7874 (new)
    target_version: 1.12.2
    tags: pullup

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

diff --git a/src/lib/krb5/os/sendto_kdc.c b/src/lib/krb5/os/sendto_kdc.c
index 828bfff..e60a375 100644
--- a/src/lib/krb5/os/sendto_kdc.c
+++ b/src/lib/krb5/os/sendto_kdc.c
@@ -214,6 +214,7 @@ krb5_sendto_kdc(krb5_context context, const krb5_data *message,
     if (retval)
         return retval;
 
+    err = 0;
     retval = k5_sendto(context, message, &servers, socktype1, socktype2,
                        NULL, reply, NULL, NULL, &server_used,
                        check_for_svc_unavailable, &err);