Fix singletons

Don't try to save the server URL if we are operating
as a singleton since we won't have one.

Signed-off-by: Ralph Castain <rhc@pmix.org>

Author: rhc54

src/client/pmix_client.c

@@ -838,7 +838,8 @@ pmix_status_t PMIx_Init(pmix_proc_t *proc,
     pmix_init_result = rc;
 
     /* store our server's ID */
-    if (NULL != pmix_client_globals.myserver &&
+    if (!pmix_client_globals.singleton &&
+        NULL != pmix_client_globals.myserver &&
         NULL != pmix_client_globals.myserver->info) {
         kptr = PMIX_NEW(pmix_kval_t);
         kptr->key = strdup(PMIX_SERVER_NSPACE);