minor tweaks

diff --git a/progs/tests/vpeval.c b/progs/tests/vpeval.c
index c35906d..8b6996d 100644 (file)
--- a/progs/tests/vpeval.c
+++ b/progs/tests/vpeval.c
@@ -8,6 +8,9 @@
 
 #include <assert.h>
 #include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#define GL_GLEXT_PROTOTYPES
 #include <GL/glut.h>