levels: Update E2M4.

More context in this thread:
http://www.doomworld.com/vb/freedoom/69882-new-maps-e2m5-and-e2m9/
This commit is contained in:
Protox 2014-09-06 22:58:53 -04:00 committed by Simon Howard
parent 96e3f8ea63
commit b6c26942b4

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