topo/base: fix coverity issue

CID 1295340 Unchecked return value (CHECKED_RETURN)

Check the return code of mca_base_framework_open. If the call fails for some reason
the component array will not be properly defined. This will cause issues in
mca_topo_base_find_available.

Signed-off-by: Nathan Hjelm <hjelmn@me.com>

ompi/mca/topo/base/topo_base_lazy_init.c

@@ -1,3 +1,4 @@
+/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
 /*
  * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
  *                         University Research and Technology
@@ -11,6 +12,8 @@
  *                         All rights reserved.
  * Copyright (c) 2009      Cisco Systems, Inc.  All rights reserved.
  * Copyright (c) 2012-2015 Inria.  All rights reserved.
+ * Copyright (c) 2015      Los Alamos National Security, LLC. All rights
+ *                         reserved.
  * $COPYRIGHT$
  * 
  * Additional copyrights may follow
@@ -39,7 +42,12 @@ int mca_topo_base_lazy_init(void)
         /**
          * Register and open all available components, giving them a chance to access the MCA parameters.
          */
-        mca_base_framework_open (&ompi_topo_base_framework, MCA_BASE_REGISTER_DEFAULT);
+
+        err = mca_base_framework_open (&ompi_topo_base_framework, MCA_BASE_REGISTER_DEFAULT);
+        if (OMPI_SUCCESS != err) {
+            return err;
+        }
+
         if (OMPI_SUCCESS !=
             (err = mca_topo_base_find_available(OPAL_ENABLE_PROGRESS_THREADS,
                                                 OMPI_ENABLE_THREAD_MULTIPLE))) {