progs: Port most of the demos to glew.
A couple of test weren't ported due to glew breakage -- it undefines
GLAPIENTRY.
diff --git a/progs/demos/copypix.c b/progs/demos/copypix.c
index 15001e8..51435ac 100644
--- a/progs/demos/copypix.c
+++ b/progs/demos/copypix.c
@@ -6,11 +6,10 @@
*/
-#define GL_GLEXT_PROTOTYPES
-
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <GL/glew.h>
#include <GL/glut.h>
#include "readtex.h"
@@ -234,6 +233,7 @@
glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE);
glutCreateWindow(argv[0]);
+ glewInit();
Init(ciMode, filename);
Usage();