Removed a lot of occurences of windows.h (and added necessary other
includes).

diff --git a/graphics/fontengine.c b/graphics/fontengine.c
index 1ea67c7..f9016de 100644
--- a/graphics/fontengine.c
+++ b/graphics/fontengine.c
@@ -8,7 +8,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <debug.h>     
-#include "windows.h"
+#include "winbase.h"
 #include "font.h"