pmix/external: fix typo and silence a warning

opal/mca/pmix/external/pmix_ext_server_south.c

@@ -231,7 +231,7 @@ int pmix1_server_register_nspace(opal_jobid_t jobid,
                 pmapinfo = (opal_list_t*)kv->data.ptr;
                 szmap = opal_list_get_size(pmapinfo);
                 PMIX_INFO_CREATE(pmap, szmap);
-                pinfo[n].value.data.array.array = (struct pmix_info_t*)pmap;
+                pinfo[n].value.data.array.array = (struct pmix_info*)pmap;
                 pinfo[n].value.data.array.size = szmap;
                 m = 0;
                 OPAL_LIST_FOREACH(k2, pmapinfo, opal_value_t) {