Fixed Linedef executor tag conflict in RVZ1

(Red Volcano Zone 1) This button causes the surrounding lava block to descend, but it also causes the new single player-only barrier to have its ceiling lowered with it, like so:




It's just enough to still get through with a spin, but on the other side there's a missing texture because this ceiling isn't supposed to move.

There, just went and fixed this silly bug myself. =/

I already knew about this but honestly, I thought that was supposed to happen, so I just ignored that.