PSP2: Fix some warnings
PSP2: Fix some warnings

fr500/mgba,Iniquitatis/mgba,fr500/mgba,iracigt/mgba,Iniquitatis/mgba,Anty-Lemon/mgba,libretro/mgba,fr500/mgba,mgba-emu/mgba,mgba-emu/mgba,sergiobenrocha2/mgba,libretro/mgba,Anty-Lemon/mgba,iracigt/mgba,sergiobenrocha2/mgba,sergiobenrocha2/mgba,mgba-emu/mgba,jeremyherbert/mgba,Anty-Lemon/mgba,libretro/mgba,mgba-emu/mgba,Anty-Lemon/mgba,iracigt/mgba,Iniquitatis/mgba,jeremyherbert/mgba,sergiobenrocha2/mgba,sergiobenrocha2/mgba,iracigt/mgba,jeremyherbert/mgba,libretro/mgba,libretro/mgba,jeremyherbert/mgba,fr500/mgba,Iniquitatis/mgba