Since it's not an error to not have an mpool module (at least not

yet), guarantee to initialize the *allow_multi_user_threads so that we
don't get read-from-uninitialized warnings in valgrind.

This commit was SVN r1446.

src/mca/mpool/base/mpool_base_init.c

@@ -32,6 +32,10 @@ int mca_mpool_base_init(bool *allow_multi_user_threads)
   mca_mpool_t *module;
   mca_mpool_base_selected_module_t *sm;
 
+  /* Default to true in case there's no modules selected */
+
+  *allow_multi_user_threads = true;
+
   /* Traverse the list of available modules; call their init
      functions. */