$NetBSD$

- use standard headers

--- src/regex19.c.~3~	1996-07-16 01:44:24.000000000 +0000
+++ src/regex19.c
@@ -25,6 +25,8 @@
   #pragma alloca
 #endif
 
+#include <stdlib.h>
+
 #define _GNU_SOURCE
 
 #ifdef HAVE_CONFIG_H
