[RC1] Volcano Projectile Mouseover debug window

[nehal]

I had an instance last night(aka no log, sorry) where a projectile:volcano happened to be on the same tile as my character. I was at a Daikara level entrance, so I was at the bottom-most row of the level(should that matter) and mousing over the tile with my character in it would cause the JIT Lua Debugger to pop up. Being late, i didn't record the error, mea culpa.