An id is sometimes undefined when changing rooms

[KevinW90]

moving rooms sometimes causes an id to be undefined. Either ef.id or poison.id from the console error.

Error Message:
enterRoom.js:73 Uncaught TypeError: Cannot read property 'id' of undefined
at enterRoom.js:73
at Array.findIndex ()
at CurrentRoom.destroy (enterRoom.js:73)
at enterNewRoom (enterRoom.js:39)
at HTMLElement.action (player.js:75)
at HTMLElement. (touch-icon.js:28)
(anonymous) @ enterRoom.js:73
destroy @ enterRoom.js:73
enterNewRoom @ enterRoom.js:39
action @ player.js:75
(anonymous) @ touch-icon.js:28

enterRoom.js:73 let i = this._player.effects.findIndex((ef) => ef.id === this._poison.id);