[next] adding mario via the addons menu and then backing out crashes the game

looks like the crash line is lua_getref(gL, hookRefs[hook->id]);

srb2win-next-06dfd360e.exe caused an Access Violation at location 005D6EE5 in module srb2win-next-06dfd360e.exe Reading from location A75CEDEC.

Registers:
eax=64225b09 ebx=0566fb10 ecx=168e0858 edx=16d381c8 esi=00000002 edi=00000000
eip=005d6ee5 esp=0566fa90 ebp=0566fb48 iopl=0         nv up ei pl nz na pe nc
cs=0023  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00210202

AddrPC   Params
005D6EE5 0566FB70 00000000 00000000  srb2win-next-06dfd360e.exe!LUA_HookMusicChange  [C://projects//srb2//src/lua_hooklib.c @ 389]
004B7D6C 00000000 00000000 00000000  srb2win-next-06dfd360e.exe!M_ChangeMenuMusic  [C://projects//srb2//src/m_menu.c @ 2697]