[Ohrrpgce] SVN: teeemcee/12031 Fix SerializeZoneTiles bug that caused spans of 256 tiles to be serializ

[subversion at HamsterRepublic.com]

teeemcee
2020-10-19 21:50:21 -0700 (Mon, 19 Oct 2020)
404
Fix SerializeZoneTiles bug that caused spans of 256 tiles to be serialized wrong

(A span is a horizontal row of tiles that are all 0 (not in the zone) or 1 (in
the zone)).  So if you had a map of width exactly 256 and filled it with a zone
it would be written empty.

Also, if you resized a map adding >= 256 tiles to the left an overflow would
cause all the zonemaps to shift left by a multiple of 256.
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U   wip/loading.rbas
U   wip/whatsnew.txt