Merge to get fix for LOCK TABLES + DROP TABLE in another thread

libmysql/libmysql.c

@@ -218,6 +218,9 @@ int my_connect(my_socket s, const struct sockaddr *name, uint namelen,
    * implementations of select that don't adjust tv upon
    * failure to reflect the time remaining
    */
+#ifdef HAVE_POLL
+  return(0);
+#endif
   start_time = time(NULL);
   for (;;)
   {