WadMapConverter|Id1Map: Use the LumpIndex API to locate map data lumps
Rather than have the Id1Map converter negotiate the old and obsolete WAD API, provide the converter with the LumpIndex to use when locating map data lumps.
As a LumpIndex is used both at WAD file level and globally for central lump index, this means one can now convert a specific map independent of DOOM's old fashioned global lump index mechanism.
WadMapConverter|Id1Map: Use the LumpIndex API to locate map data lumps
Rather than have the Id1Map converter negotiate the old and obsolete
WAD API, provide the converter with the LumpIndex to use when locating
map data lumps.
As a LumpIndex is used both at WAD file level and globally for central
lump index, this means one can now convert a specific map independent
of DOOM's old fashioned global lump index mechanism.