Call cancelAnimationFrame on game end/crash

[Toad06]

• Fixed the case where any error occurring before the game reached its final state would prevent the initialisation from proceeding to the next step (g_StartUpState variable). Consequently, the same error-inducing code would execute at each requestAnimationFrame call.

Basically, a code snippet like this in a Create Event in the first room of the game would show the message endlessly:

show_message("test");
var a = "c";
var b = a + 1; // error

This is likely related to YoYoGames/GameMaker-Bugs#4726, but I'm attaching another sample here.

• The previous change also fixed the very unlikely case where managing to call game_restart, room_goto or similar after a game end/crash would work.

These changes only work on browsers that support requestAnimation / cancelAnimationFrame, which should be fine since the browser vendors implemented these features more than a decade ago. The only affected browser is Opera Mini but I'm not sure GameMaker would run on it at all since it lacks so many features.