Disable blending in backgrounds when unnecessary
Disable blending in backgrounds when unnecessary

askotx/mgba,mgba-emu/mgba,AdmiralCurtiss/mgba,libretro/mgba,matthewbauer/mgba,Touched/mgba,Iniquitatis/mgba,sergiobenrocha2/mgba,mgba-emu/mgba,Anty-Lemon/mgba,zerofalcon/mgba,Touched/mgba,AdmiralCurtiss/mgba,Anty-Lemon/mgba,fr500/mgba,jeremyherbert/mgba,Anty-Lemon/mgba,jeremyherbert/mgba,bentley/mgba,zerofalcon/mgba,Iniquitatis/mgba,Iniquitatis/mgba,iracigt/mgba,askotx/mgba,zerofalcon/mgba,sergiobenrocha2/mgba,cassos/mgba,fr500/mgba,MerryMage/mgba,iracigt/mgba,nattthebear/mgba,sergiobenrocha2/mgba,Touched/mgba,Anty-Lemon/mgba,MerryMage/mgba,mgba-emu/mgba,askotx/mgba,askotx/mgba,sergiobenrocha2/mgba,Iniquitatis/mgba,iracigt/mgba,fr500/mgba,cassos/mgba,matthewbauer/mgba,mgba-emu/mgba,MerryMage/mgba,AdmiralCurtiss/mgba,jeremyherbert/mgba,fr500/mgba,iracigt/mgba,nattthebear/mgba,libretro/mgba,libretro/mgba,bentley/mgba,libretro/mgba,jeremyherbert/mgba,cassos/mgba,sergiobenrocha2/mgba,libretro/mgba