math/gfreduce.h: Missing include.

diff --git a/math/gfreduce.h b/math/gfreduce.h
index 2c8a884..b60c8fa 100644 (file)
--- a/math/gfreduce.h
+++ b/math/gfreduce.h
@@ -34,6 +34,8 @@
 
 /*----- Header files ------------------------------------------------------*/
 
 
 /*----- Header files ------------------------------------------------------*/
 

+#include <stdio.h>
+

 #ifndef CATACOMB_GF_H
 #  include "gf.h"
 #endif
 #ifndef CATACOMB_GF_H
 #  include "gf.h"
 #endif