move #include <GL/glut.h> after other #includes for Windows
diff --git a/progs/demos/tessdemo.c b/progs/demos/tessdemo.c
index 26403ee..f71cea1 100644
--- a/progs/demos/tessdemo.c
+++ b/progs/demos/tessdemo.c
@@ -4,10 +4,10 @@
  * Updated for GLU 1.3 tessellation by Gareth Hughes <gareth@valinux.com>
  */
 
-#include <GL/glut.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <GL/glut.h>
 
 #define MAX_POINTS	256
 #define MAX_CONTOURS	32