If data == NULL, not store the config.

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@24911 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/krb5/cache.c

@@ -1315,6 +1315,7 @@ krb5_cc_set_config(krb5_context context, krb5_ccache id,
     if (ret && ret != KRB5_CC_NOTFOUND)
         goto out;
 
+    if (data) {
 	/* not that anyone care when this expire */
 	cred.times.authtime = time(NULL);
 	cred.times.endtime = cred.times.authtime + 3600 * 24 * 30;
@@ -1324,6 +1325,7 @@ krb5_cc_set_config(krb5_context context, krb5_ccache id,
 	    goto out;
 	
 	ret = krb5_cc_store_cred(context, id, &cred);
+    }
 
 out:
     krb5_free_cred_contents (context, &cred);