Revert a patch for Bug#54334 (Double initialization of mysys mutexes).

Revision ID of the patch: marc.alff@oracle.com-20100608124148-lr1ult7lwo75niev

mysys/my_init.c

@@ -104,6 +104,8 @@ my_bool my_basic_init(void)
   mysql_stdin= & instrumented_stdin;
 
 #if defined(THREAD)
+  if (my_thread_global_init())
+    return 1;
 #  if defined(SAFE_MUTEX)
   safe_mutex_global_init();		/* Must be called early */
 #  endif