Update SnapC Local Coordinator in reaction to structure changes in r20228. The list of local children became more globalized so I needed to update the loop invariants appropriately.

This commit was SVN r20245.

The following SVN revision numbers were found above:
  r20228 --> open-mpi/ompi@007d68becc

orte/mca/snapc/full/snapc_full_local.c

@@ -898,8 +898,8 @@ static int snapc_full_local_get_vpids(void)
     /*
      * Otherwise update or populate the list
      */
-    for (item = opal_list_get_first(&orte_odls_globals.children);
-         item != opal_list_get_end(&orte_odls_globals.children);
+    for (item = opal_list_get_first(&orte_local_children);
+         item != opal_list_get_end(&orte_local_children);
          item = opal_list_get_next(item)) {
         child = (orte_odls_child_t*)item;