Compiling with clang

[demonstar55]

There have been some recent changes to make the server compile with clang again. I took this as an opportunity to try to figure out the run time issues.

Mostly they turned out to be clang optimizing stuff out, I suspect probably undefined behavior.

I didn't do much test, but I was able to get into game now and run around.

So if anyone wanted to use clang, please do! Report any issues here (or on github) and I can look into it.

So I guess, we now support clang, but not a binding statement yet :P


(testing was on debian running clang 3.5.0)