GBA: Error check to make sure ROM and BIOS mapping succeed
GBA: Error check to make sure ROM and BIOS mapping succeed

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