[RDY]Fixed compile problem in VS.

[Maddremor]

Since RP #21603 got merged the game no longer compiles on my Visual Studio setup, commit 32bc9fd being the culprit. Removing non_normal seems to have resolved this. However, I have no idea what that actually does, so if anyone can give this a look over, I would appreciate it.

[Coolthulhu]

non_normal has to be there. It is very, very important.
It marks a tile as something that isn't flat ground with default move cost. If it is removed, entire pathfinding will break completely and only return straight lines.

Looks like different compilers handle constexpr differently. VS must treat it as a local variable, while clang and gcc treat it as static. static variables don't need to (can't) be captured in a lambda, so just explicitly capturing it regardless of staticness will make some compilers complain.

This should be fixed by making non_normal a static const, static constexpr or something like that. This should be enough. If it isn't enough, it could be turned into a local variable (non-static, non-constexpr) and captured explicitly.

[Maddremor]

Hey, I understood some of those words!

But seriously, this is probably better dealt with by someone who has moved beyond the simian dev methodology. I just removed non_normal and hoped for the best.

[Maddremor]

Now it compiles and pathfinding seems to work in-game.