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

objects/dib.c

diff --git a/objects/dib.c b/objects/dib.c
index 3119ac9..943cdb7 100644
--- a/objects/dib.c
+++ b/objects/dib.c
@@ -18,9 +18,11 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
 
+#include "windef.h"
 #include "winbase.h"
 #include "bitmap.h"
 #include "selectors.h"