(krb5_copy_creds_contents): zero target

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@3945 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/krb5/creds.c

@@ -62,6 +62,7 @@ krb5_copy_creds_contents (krb5_context context,
 {
     krb5_error_code ret;
 
+    memset(c, 0, sizeof(*c));
     ret = krb5_copy_principal (context, incred->client, &c->client);
     if (ret)
 	goto fail;