[lib] hash compare function arguments ought to be const qualified

2008-08-14 Stephen Hemminger <stephen.hemminger@vyatta.com>

	* lib/hash.h: (struct hash) Hash comparator callback really
	  ought to treat storage behind arguments as constant - a compare
	  function with side-effects would be evil.
	* */*.c: Adjust comparator functions similarly, thus fixing at least
	  a few compiler warnings about const qualifier being dropped.

Signed-off-by: Paul Jakma <paul@quagga.net>
diff --git a/bgpd/bgp_ecommunity.h b/bgpd/bgp_ecommunity.h
index 6901423..278721c 100644
--- a/bgpd/bgp_ecommunity.h
+++ b/bgpd/bgp_ecommunity.h
@@ -72,7 +72,7 @@
 extern struct ecommunity *ecommunity_dup (struct ecommunity *);
 extern struct ecommunity *ecommunity_merge (struct ecommunity *, struct ecommunity *);
 extern struct ecommunity *ecommunity_intern (struct ecommunity *);
-extern int ecommunity_cmp (void *, void *);
+extern int ecommunity_cmp (const void *, const void *);
 extern void ecommunity_unintern (struct ecommunity *);
 extern unsigned int ecommunity_hash_make (void *);
 extern struct ecommunity *ecommunity_str2com (const char *, int, int);