c1m1: made door secret

There's a SHAWN1 door that leads to a secret. The door is now marked as
a secret, so it won't appear on the automap.
This commit is contained in:
Jason Yundt 2019-11-03 10:25:32 -05:00 committed by Mike Swanson
parent 20bbbfaa91
commit 7c1dc907e6

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