GBA Video: Don't clear flag buffers since they always get overwritten when used
GBA Video: Don't clear flag buffers since they always get overwritten when used

mgba-emu/mgba,Iniquitatis/mgba,Iniquitatis/mgba,Iniquitatis/mgba,libretro/mgba,libretro/mgba,libretro/mgba,libretro/mgba,mgba-emu/mgba,Iniquitatis/mgba,libretro/mgba,mgba-emu/mgba,mgba-emu/mgba