Door texture issue in E3M5a

[Teflon1]

The door that leads to the exit in E3M5a has a messed-up texture. It looks fine in 1.2.

I've included shots of how the door looks in 1.2 and 1.3.

[Knightmare66]

I missed this when doing some quick fixes to this map (Based on the v1.0 map source, before NPOT textures were resized). Thanks!