fix a couple of errors in r27569

This commit was SVN r27572.

The following SVN revision numbers were found above:
  r27569 --> open-mpi/ompi@f3ce12e71a

ompi/mca/pml/v/pml_v_component.c

@@ -86,7 +86,9 @@ static int mca_pml_v_component_open(void)
     V_OUTPUT_VERBOSE(500, "loaded");
 
     rc = mca_vprotocol_base_open(vprotocol_include_list);
-    free (vprotocol_include_list);
+    if (NULL == vprotocol_include_list) {
+        free (vprotocol_include_list);
+    }
 
     return rc;
 }

ompi/mca/vprotocol/base/vprotocol_base.c

@@ -28,10 +28,15 @@ int mca_vprotocol_base_open(char *vprotocol_include_list)
 {
     OBJ_CONSTRUCT(&mca_vprotocol_base_components_available, opal_list_t);
     if (NULL == vprotocol_include_list ||
-       mca_vprotocol_base_include_list[0] == 0) {
+        vprotocol_include_list[0] == 0) {
         return OMPI_SUCCESS;
     }
-    mca_vprotocol_base_include_list = strdup (vprotocol_include_list);
+    if (NULL != vprotocol_include_list) {
+      mca_vprotocol_base_include_list = strdup (vprotocol_include_list);
+    } else {
+      mca_vprotocol_base_include_list = NULL;
+    }
+
     return mca_base_components_open("vprotocol", 0, 
                                     mca_vprotocol_base_static_components, 
                                     &mca_vprotocol_base_components_available,