When file extension is longer or equal length compared to buffer holding lowercased string, strncpy does not null terminate the string.
Increased buffer size by 1 to ensure it will always be null-terminated, so that following strcmp does not read out of buffer bounds.

This truncation causes text that spans the zero coord boundary to round differently left or zero vs. right of zero, in turn causing letters to appear squished together. If you actually need the position to be an integer, you should instead `floorf()` the float, rather than doing an integer truncation, but I don't see any reason to convert it to an integer in the first place. Everything else in the equation is a float.

Update to ray4laz

This reverts commit 4f6fbaed41.

Specifically, std.fs.OpenDirOptions struct no longer has the iterable
flag, now it's a standalone function call std.fs.openIterableDir