lightningd: call disconnect notifier if other side disconnected.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

CHANGELOG.md

@@ -26,6 +26,7 @@ changes.
 ### Fixed
 
 - Plugin: `pay` no longer crashes on timeout.
+- Plugin: `disconnect` notifier now called if remote side disconnects.
 
 ### Security
 

lightningd/peer_control.c

@@ -392,6 +392,8 @@ void channel_errmsg(struct channel *channel,
 		    const char *desc,
 		    const u8 *err_for_them)
 {
+	notify_disconnect(channel->peer->ld, &channel->peer->id);
+
 	/* No per_peer_state means a subd crash or disconnection. */
 	if (!pps) {
 		channel_fail_transient(channel, "%s: %s",
@@ -405,8 +407,6 @@ void channel_errmsg(struct channel *channel,
 					     err_for_them,
 					     tal_count(err_for_them), 0);
 
-	notify_disconnect(channel->peer->ld, &channel->peer->id);
-
 	/* BOLT #1:
 	 *
 	 * A sending node: