Minor error in testH3Distance.c?

[RichardVasquez]

The last test named h3DistanceEdge() performs the same test twice at the end, though it looks like the very last assert should be flipped around.

        t_assert(H3_EXPORT(h3Distance)(edge, dest) == 1,
                 "edge has distance to destination");
        t_assert(H3_EXPORT(h3Distance)(edge, dest) == 1,
                 "destination has distance to edge");

Replacing it with t_assert(H3_EXPORT(h3Distance)(dest, edge) == 1, should fix it.

I wasn't too sure if a PR for this one line was merited.

[nrabinowitz]

Thanks for logging! I'll submit a quick fix.