message: use new avatar namespace in muc
diff: @@ -1247,9 +1247,9 @@ jsxc.muc = {
  var data = jsxc.storage.getUserItem('buddy', jsxc.jidToBid(jid));
  if (data !== null && typeof data === 'object') {
  - jsxc.gui.updateAvatar(m, jsxc.jidToBid(jid), data.avatar);
  + jsxc.gui.avatar.update(m, jsxc.jidToBid(jid), data.avatar);
  } else if (jsxc.jidToBid(jid) === ownBid) {
  - jsxc.gui.updateAvatar(m, jsxc.jidToBid(jid), 'own');
  + jsxc.gui.avatar.update(m, jsxc.jidToBid(jid), 'own');
  }
  } else {
  m.find('.jsxc_name').text(nickname);
  