Set state from dispatch payload unconditionally

As apparently doing it confitionally is bad

src/stores/RoomViewStore.js

@@ -158,21 +158,17 @@ class RoomViewStore extends Store {
     }
 
     _joinedRoom(payload) {
-        if (payload.room_id === this._state.roomId) {
         this._setState({
             joining: false,
         });
     }
-    }
 
     _joinRoomError(payload) {
-        if (payload.room_id === this._state.roomId) {
         this._setState({
             joining: false,
             joinError: payload.err,
         });
     }
-    }
 
     reset() {
         this._state = Object.assign({}, INITIAL_STATE);