dxdiag: make dxdiag a unicode rather than ANSI program

[Austin English]

-- 
-Austin
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diff --git a/programs/dxdiag/Makefile.in b/programs/dxdiag/Makefile.in
index 2e7e7b0..a8dd0d9 100644
--- a/programs/dxdiag/Makefile.in
+++ b/programs/dxdiag/Makefile.in
@@ -4,7 +4,7 @@ TOPOBJDIR = ../..
 SRCDIR    = @srcdir@
 VPATH     = @srcdir@
 MODULE    = dxdiag.exe
-APPMODE   = -mwindows
+APPMODE   = -mwindows -municode
 IMPORTS   = kernel32
 
 C_SRCS = \
diff --git a/programs/dxdiag/main.c b/programs/dxdiag/main.c
index d24945c..d8a4866 100644
--- a/programs/dxdiag/main.c
+++ b/programs/dxdiag/main.c
@@ -20,8 +20,9 @@
 
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
+#include "wine/unicode.h"
 
-int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR cmdline, int cmdshow)
+int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPWSTR cmdline, int cmdshow)
 {
     return 0;
 }