[BUG]Rednet issue

[JacobHodgkins]

rednet.receive() time out doesn't work, for example

rednet.receive(5) --should time out after 5 seconds

instead it gives expected number, got number error

[SquidDev]

I think this was fixed it #447, we just haven't had a release since then. I'd recommended checking out a build from https://cc.crzd.me instead.