A_RemoveFlags doesn't work properly sometimes

[rfomin]

Bug report: [doomworld]
Test WAD: unfix_that.zip
From my tests, this WAD works differently in the latest versions of DSDA-Doom and Woof.
Works if revert 1d27148

[rfomin]

I think the issue is size of this map, blockmap is 342x241.
See: https://github.com/kraflab/dsda-doom/blob/9980aed705d1fdddbdef3672f8ae806ce7c869e0/prboom2/src/p_setup.c#L3030-L3034

[fabiangreffrath]

The blockmap expansion code was requested to add in #759.

[rfomin]

Not sure if this test map works at all. What is the maximum size of Doom map, unsigned short? Test map size is 43648x30768

[rfomin]

I've made smaller version: unfix.zip
Now it works in DSDA-Doom 0.27.5 and Woof 14.5.0, but it does not work in the most recent versions.

[rfomin]

@fabiangreffrath Do you know why we need 1d27148?

[fabiangreffrath]

This is the discussion behind it:

kraflab/dsda-doom#504

[rfomin]

Thanks, I forgot. Hmm, so we do need a new comp_ flag after all? I wonder why test WAD doesn't work, looks good to me.