Merge pull request #4074 from bosilca/topic/coverity

Fix coverity complaints.

Author: bosilca

ompi/mca/topo/treematch/topo_treematch_component.c

@@ -62,9 +62,11 @@ mca_topo_treematch_component_2_2_0_t mca_topo_treematch_component =
 
 static int init_query(bool enable_progress_threads, bool enable_mpi_threads)
 {
-    if(NULL == opal_hwloc_topology) {
-        return OPAL_ERR_NOT_SUPPORTED;
-    }
+    /* The first time this function is called is too early in the process and
+     * the HWLOC topology information is not available. Thus we should not check
+     * for the topology here, but instead delay the check until we really need
+     * the topology information.
+     */
     return OMPI_SUCCESS;
 }