Fixed per kpfleming's suggestion to asterisk-dev.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@34464 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_agent.c

@@ -2586,6 +2586,7 @@ static int unload_module(void *mod)
 {
 	struct agent_pvt *p;
 	/* First, take us out of the channel loop */
+	ast_channel_unregister(&agent_tech);
 	/* Unregister dialplan functions */
 	ast_custom_function_unregister(&agent_function);	
 	/* Unregister CLI commands */
@@ -2610,7 +2611,6 @@ static int unload_module(void *mod)
 	}
 	AST_LIST_UNLOCK(&agents);
 	AST_LIST_HEAD_DESTROY(&agents);
-	ast_channel_unregister(&agent_tech);
 	return 0;
 }