Small fix to bounding-box logic

[jnnnnn]

We need to include levels which are partly inside the bounding box...

[udoprog]

the xPos/zPos are already chunk specific coordinates, I think it's preferential to have the limits on the 16 block chunks, since this is also how coordinates are often reflected elsewhere (as spawning point by default is 60 south), but this should include the blocks, as you mentioned.

[jnnnnn]

I can't test at the moment but I think the logic is wrong.

For example, if you request a slice a single block high with -L 2,2,2,2 then the unfixed logic will filter out all levels, because the relevant level coordinates (0,0,0,0) are "outside" the bounding box. The +1s on the level coordinates (before *mc::MapX etc.) ensure that the test includes levels that would otherwise be filtered out in this way.

[udoprog]

Yep, it should probably be limiting the way you are specifying, that's the most intuitive.