Fix crashes when GBARR is not initialized
Fix crashes when GBARR is not initialized

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