Fixed some issues found by winapi_check.

diff --git a/windows/message.c b/windows/message.c
index 25d1ecd..bb3b0c6 100644
--- a/windows/message.c
+++ b/windows/message.c
@@ -1201,7 +1201,8 @@
 
 
 /***********************************************************************
- *		BroadcastSystemMessage (USER32.@)
+ *		BroadcastSystemMessage  (USER32.@)
+ *		BroadcastSystemMessageA (USER32.@)
  */
 LONG WINAPI BroadcastSystemMessage(
 	DWORD dwFlags,LPDWORD recipients,UINT uMessage,WPARAM wParam,