Hatches stay during open animation of hazard shutters

[skull132]

Related to PR #562
The door hatch overlay should be cleaned up before the open animation is showcased. That way, you don't have a hatch floating in the middle of the door.

[NanakoAC]

Only applies to hazard shutters. Normal airlocks work fine

[skull132]

Nooope, they don't.

Any airlock on the test server does its open animation, and then cleans up the overlays. This leaves the hatch standing out from the ground as if it's some kind of odd codpiece.

[skull132]

Merged. Above reply seemed to be a clientside issue with using a BYOND version below 510.