hwloc/rmaps base: Add missing help message.

Also, add missing ORTE_ERROR_LOG in the other case where this error
message is used (i.e., ORTE_ERROR_LOG was used in the one place, so
let's also use it in the other place).

This commit was SVN r31321.

opal/mca/hwloc/base/help-opal-hwloc-base.txt

@@ -56,3 +56,11 @@ been deprecated and replaced as follows:
 
 The deprecated forms *will* disappear in a future version of Open MPI.
 Please update to the new syntax.
+#
+[obj-idx-failed]
+Open MPI failed to find a cache of a specified type.  This is a highly
+unusual error; it may indicate a system configuration error.  This
+additional information may be of help:
+
+  Message:     %s
+  Cache level: %d

orte/mca/rmaps/base/rmaps_base_binding.c

@@ -9,7 +9,7 @@
  *                         University of Stuttgart.  All rights reserved.
  * Copyright (c) 2004-2005 The Regents of the University of California.
  *                         All rights reserved.
- * Copyright (c) 2011      Cisco Systems, Inc.  All rights reserved.
+ * Copyright (c) 2011-2014 Cisco Systems, Inc.  All rights reserved.
  * Copyright (c) 2011-2012 Los Alamos National Security, LLC.
  *                         All rights reserved.
  * Copyright (c) 2013-2014 Intel, Inc. All rights reserved
@@ -448,6 +448,7 @@ static int bind_in_place(orte_job_t *jdata,
             }
             /* get the index of this location */
             if (UINT_MAX == (idx = opal_hwloc_base_get_obj_idx(node->topology, proc->locale, OPAL_HWLOC_AVAILABLE))) {
+                ORTE_ERROR_LOG(ORTE_ERR_BAD_PARAM);
                 return ORTE_ERR_SILENT;
             }
             /* track the number bound */