votequorum.c: avoid a new warning and add a comment in cpg.h

* votequorum.c: Avoid declaration of unused: ‘votequorum_instance_destructor’
* include/corosync/cpg.h (cpg_deliver_fn_t) [msg]: Add a comment explaining
why this member is not const.

git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@2169 fd59a12c-fef9-0310-b244-a6a79926bd2f

include/corosync/cpg.h

@@ -88,6 +88,10 @@ typedef void (*cpg_deliver_fn_t) (
 	const struct cpg_name *group_name,
 	uint32_t nodeid,
 	uint32_t pid,
+	/*
+	 * Unlike many "msg" pointers, this one is deliberately *not*
+	 * declared const in order to permit in-place endian conversion.
+	 */
 	void *msg,
 	size_t msg_len);
 

lib/votequorum.c

@@ -64,8 +64,6 @@ struct votequorum_inst {
 	votequorum_callbacks_t callbacks;
 };
 
-static void votequorum_instance_destructor (void *instance);
-
 DECLARE_HDB_DATABASE(votequorum_handle_t_db,NULL);
 
 cs_error_t votequorum_initialize (