GBA Video: Fix forced transparency OBJ blending in GL
GBA Video: Fix forced transparency OBJ blending in GL

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