Core: Reject mVL with zero-length initial states
Core: Reject mVL with zero-length initial states

mgba-emu/mgba,Iniquitatis/mgba,mgba-emu/mgba,Iniquitatis/mgba,fr500/mgba,libretro/mgba,Anty-Lemon/mgba,fr500/mgba,libretro/mgba,mgba-emu/mgba,Anty-Lemon/mgba,Iniquitatis/mgba,mgba-emu/mgba,Anty-Lemon/mgba,libretro/mgba,fr500/mgba,libretro/mgba,libretro/mgba,fr500/mgba,Anty-Lemon/mgba,Iniquitatis/mgba