GBA BIOS: Define M_PI if not defined
GBA BIOS: Define M_PI if not defined

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