Missing cave Dune Desert @ 380977 / -266617

[ehoffman2]

Edit: Y coord was wrong (should have been negative). Fixed.

Issue

As simple as title says. Just a simple addition (another one!), probably new to 1.0.

There is a missing cave in Dune Desert, entrance at 380977 / -266617, behind boulders. There's a purple power slug in it (and a cat).

Replication

1. Self explanatory above. Go to this location, break the boulders, look at cave entrance behind.

Actual Result

It is not mapped in SCIM.

Expected Result

Should be added to SCIM.