message: add m.sticker support
diff: @@ -109,9 +109,9 @@ export class MatrixRoomHandler {
  }
  } else if (event.type === "m.room.redaction" && context.rooms.remote) {
  return this.discord.ProcessMatrixRedact(event);
  - } else if (event.type === "m.room.message") {
  + } else if (event.type === "m.room.message" || event.type === "m.sticker") {
  log.verbose("MatrixRoomHandler", "Got m.room.message event");
  - if (event.content.body && event.content.body.startsWith("!discord")) {
  + if (event.type === "m.room.message" && event.content.body && event.content.body.startsWith("!discord")) {
  return this.ProcessCommand(event, context);
  } else if (context.rooms.remote) {
  const srvChanPair = context.rooms.remote.roomId.substr("_discord".length).split("_", ROOM_NAME_PARTS);
  