Check for NULL before release, just to be safe

This commit was SVN r13162.

orte/mca/ns/base/data_type_support/ns_data_type_release_fns.c

@@ -31,6 +31,8 @@
  */
 void orte_ns_base_std_release(orte_data_value_t *value)
 {
+    if (NULL == value) return;
+    
     free(value->data);
     value->data = NULL;
 }