Non-empty inner set for y == log(x)

[dpsanders]

julia> C = Separator(y == log(x), vars)
Separator(in(y - log(x), [0, 0]), vars=x, y)

julia> inner, boundary = pave(X, C, 0.01)

gives a non-empty inner set, whereas it should be empty since this is a 1-dimensional curve.

[dpsanders]

Fixed in the latest commit of #212