BUG#9626 Several serious errors reported by Valgrind in latest 5.0 bk tree

 - Fixing obvious ones


sql/ha_ndbcluster.cc:
  Delete ndb object before exiting thread

sql/ha_ndbcluster.cc

@@ -5803,6 +5803,7 @@ extern "C" pthread_handler_decl(ndb_util_thread_func,
   {
     thd->cleanup();
     delete thd;
+    delete ndb;
     DBUG_RETURN(NULL);
   }
 
@@ -5921,6 +5922,7 @@ extern "C" pthread_handler_decl(ndb_util_thread_func,
 
   thd->cleanup();
   delete thd;
+  delete ndb;
   DBUG_PRINT("exit", ("ndb_util_thread"));
   my_thread_end();
   pthread_exit(0);