Fixed header dependencies to be fully compatible with the Windows
headers (with help from Dimitrie O. Paun).

tools/winebuild/parser.c

diff --git a/tools/winebuild/parser.c b/tools/winebuild/parser.c
index 26a2b34..10db504 100644
--- a/tools/winebuild/parser.c
+++ b/tools/winebuild/parser.c
@@ -27,10 +27,12 @@
 
 #include <assert.h>
 #include <ctype.h>
+#include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+#include "windef.h"
 #include "winbase.h"
 #include "build.h"