Mario Kart Wii cheats fail to work on the latest nightly

[Khangaroo]

Tested on the latest nightly (5.0-2877) and a clean Dolphin Emulator folder.

For some reason, Mario Kart Wii cheats simply don't work on the latest nightly. They work perfectly fine on the 5.0 stable, so that's a bit odd. The cheats checkbox is checked and GameCube cheats appear to work fine.

[JosJuice]

Cheats are broken in Wii disc games that are launched from the game list, starting with 5.0-2830 and ending with 5.0-2925. The latest version right now is actually 5.0-2939, but the buildbots haven't been making master builds lately for some reason, so no binaries are available for versions after 5.0-2877.