$NetBSD$

Use standard headers.

--- format.c~	2011-10-03 06:32:50.000000000 +0000
+++ format.c
@@ -5,6 +5,7 @@
  */
 
 #include <string.h>
+#include <stdlib.h>
 
 #include "jcabc2ps.h"
 #include "misc.h"
