progs: Get more samples building on windows.
diff --git a/progs/demos/stex3d.c b/progs/demos/stex3d.c
index 83ae368..c0bbea0 100644
--- a/progs/demos/stex3d.c
+++ b/progs/demos/stex3d.c
@@ -18,7 +18,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
-#include <GL/gl.h>
+#include <GL/glew.h>
 #include <GL/glut.h>
 
 
@@ -662,6 +662,8 @@
       exit(0);
    }
 
+   glewInit();
+
    init();
 
    printHelp();