compatability w/ WIP moreblocks/stairsplus

[fluxionary]

update for compatibility with minetest-mods/moreblocks#191. without this update, things will still work, but stairsplus ("circular saw") integration won't register.

[SwissalpS]

@fluxionary what's the state of this? I see that the PR#191 has been closed. Did the part that concerns this mod get merged in another PR or did you fork?

Guess I could add this anyway to support your fork, but I'd like to make sure first the changes you PRed here are still valid.

[fluxionary]

@fluxionary what's the state of this? I see that the PR#191 has been closed. Did the part that concerns this mod get merged in another PR or did you fork?

Guess I could add this anyway to support your fork, but I'd like to make sure first the changes you PRed here are still valid.

I made a hard fork, though a couple people are still petitioning Calinou to accept my PR. the hard fork is being used on at least a couple servers, and I'm supporting it.

[SwissalpS]

@fluxionary Since minetest-mods still hasn't merged your fork, I've finally added support for it.
Sorry I didn't use your approach, I was weighing back and forth for some time and decided not to split moreblocks compat into two files.

If you have a moment to scan this PR or maybe even test it with your fork that would be much apreciated.
#54