Fix compilation of user/tests/msg.c on Windows

[Francois Gouget]

Changelog:

  * dlls/user/tests/msg.c

    VK_N is not defined in the Windows SDK.


-- 
Francois Gouget         fgouget at free.fr        http://fgouget.free.fr/
      We are Pentium of Borg. You will be approximated. Division is futile.
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Index: dlls/user/tests/msg.c
===================================================================
RCS file: /var/cvs/wine/dlls/user/tests/msg.c,v
retrieving revision 1.49
diff -u -r1.49 msg.c
--- dlls/user/tests/msg.c	11 Oct 2004 19:55:28 -0000	1.49
+++ dlls/user/tests/msg.c	22 Oct 2004 12:18:57 -0000
@@ -3028,6 +3028,9 @@
     CloseHandle(hThread);
 }
 
+#ifndef VK_N
+#define VK_N 0x4e
+#endif
 
 static const struct message WmVkN[] = {
     { WM_KEYDOWN, wparam|lparam, VK_N, 1 },