Before version 30 (PrePreAlpha) a zone file's scene is only a u32 scene
ID, with no scene file name (LuzReader::ReadScenes, 1.10.64:
revision < 30 reads the ID alone; LuzFile::ReadLUZFile treats anything
below 20 as 20). The reader read a file name and then an ID for those
versions, which is not the format, and the world could not load such a
zone's scenes anyway. Reading one now throws a runtime_error that says
why, before anything else is read.
No zone file of any client on disk is older than 30 except an unnamed
editor stub (a res/.luz, version 20).
Check in game: every world loads as before.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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