trivial diff: configure.in: add missing #include

[Fergus Henderson]

Estimated hours taken: 0.1

configure.in:
	Add a missing `#include <stdlib.h>' to the test for using sockets.
	It's needed because the test code uses getenv().

Index: configure.in
===================================================================
RCS file: /home/staff/zs/imp/mercury/configure.in,v
retrieving revision 1.156
diff -u -r1.156 configure.in
--- configure.in	1999/03/30 05:45:18	1.156
+++ configure.in	1999/04/03 15:40:48
@@ -1844,6 +1844,7 @@
 	#include <string.h>
 	#include <errno.h>
 	#include <stdarg.h>
+	#include <stdlib.h>
 	#include <sys/types.h>
 	#include <unistd.h>
 	#include <sys/socket.h>

-- 
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WWW: <http://www.cs.mu.oz.au/~fjh>  |  of excellence is a lethal habit"
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