[PATCH] mod_muc_badge: If room has no title use localpart of room's jid (fixes #1767)

[Bernhard Geier]

Rooms may have a title/name, but they do not have to. A JID is enough.

When trying to get the badge for a room without a title, mod_muc_badge
throws a HTTP error 500 (with Lua 5.1) or shows a "nil" label in the SVG
badge (with Lua 5.2).

This patch uses this JID's localpart if a room has no title to fix that.

[Kim Alvefur]

># HG changeset patch

Thanks for the patch, it has been applied:
https://hg.prosody.im/prosody-modules/rev/8a4b17e2e984

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Zash