Fix typo in psm mtl

This commit was SVN r32332.

ompi/mca/mtl/psm/mtl_psm.c

@@ -316,7 +316,7 @@ ompi_mtl_psm_add_procs(struct mca_mtl_base_module_t *mtl,
 		for (j = 0; j < (int) nprocs; j++) {
 		  if (errs_out[j] == thiserr) {
                       opal_output(0, " %s", (NULL == procs[j]->super.proc_hostname) ?
-                                  "unknown" : procs[j]->proc_hostname);
+                                  "unknown" : procs[j]->super.proc_hostname);
 		  }
 		}
 		opal_output(0, "\n");