user32: Pass HWND_BOTTOM unmodified to the server in PeekMessage.

dlls/user32/message.c

@@ -2034,8 +2034,7 @@ static BOOL peek_message( MSG *msg, HWND hwnd, UINT first, UINT last, UINT flags
     if (!(buffer = HeapAlloc( GetProcessHeap(), 0, buffer_size ))) return FALSE;
 
     if (!first && !last) last = ~0;
-    if (hwnd == HWND_BROADCAST || hwnd == HWND_TOPMOST || hwnd == HWND_BOTTOM)
-        hwnd = (HWND)-1;
+    if (hwnd == HWND_BROADCAST) hwnd = HWND_TOPMOST;
 
     for (;;)
     {

server/queue.c

@@ -636,7 +636,7 @@ static void reply_message( struct msg_queue *queue, lparam_t result,
 static int match_window( user_handle_t win, user_handle_t msg_win )
 {
     if (!win) return 1;
-    if (win == (user_handle_t)-1) return !msg_win;
+    if (win == -1 || win == 1) return !msg_win;
     if (msg_win == win) return 1;
     return is_child_window( win, msg_win );
 }