user32: Add a stub implementation of ChangeWindowMessageFilter.

[Hans Leidekker]

See http://bugs.winehq.org/show_bug.cgi?id=15930

 -Hans

diff --git a/dlls/user32/message.c b/dlls/user32/message.c
index aeda7b3..e049d57 100644
--- a/dlls/user32/message.c
+++ b/dlls/user32/message.c
@@ -3701,3 +3701,12 @@ BOOL WINAPI IsHungAppWindow( HWND hWnd )
     SERVER_END_REQ;
     return ret;
 }
+
+/******************************************************************
+ *      ChangeWindowMessageFilter (USER32.@)
+ */
+BOOL WINAPI ChangeWindowMessageFilter( UINT message, DWORD flag )
+{
+    FIXME( "%x %08x\n", message, flag );
+    return TRUE;
+}
diff --git a/dlls/user32/user32.spec b/dlls/user32/user32.spec
index f19178d..8d55717 100644
--- a/dlls/user32/user32.spec
+++ b/dlls/user32/user32.spec
@@ -37,6 +37,7 @@
 @ stdcall ChangeDisplaySettingsW(ptr long)
 @ stdcall ChangeMenuA(long long ptr long long)
 @ stdcall ChangeMenuW(long long ptr long long)
+@ stdcall ChangeWindowMessageFilter(long long)
 @ stdcall CharLowerA(str)
 @ stdcall CharLowerBuffA(str long)
 @ stdcall CharLowerBuffW(wstr long)