relay: fix send of "PART" command in backlog (irc protocol)

ChangeLog.adoc

@@ -33,6 +33,7 @@ Bug fixes::
 
   * core: call the config hook when options are renamed or removed
   * buflist: fix crash in auto-scroll of bar when the buflist item is not the first item in the bar
+  * relay: fix send of "PART" command in backlog (irc protocol)
   * relay: fix parsing of CAP command without arguments in irc protocol, send ACK only if all capabilities received are OK and NAK otherwise (issue #1040)
 
 Tests:

src/plugins/relay/irc/relay-irc.c

@@ -906,6 +906,7 @@ relay_irc_send_channel_backlog (struct t_relay_client *client,
                                      (ptr_host) ? "!" : "",
                                      (ptr_host) ? ptr_host : "",
                                      channel);
+                    break;
                 case RELAY_IRC_CMD_QUIT:
                     relay_irc_sendf (client,
                                      "%s:%s%s%s QUIT",