Fix for #29; instant snap back when looping: false

[dokterbob]

Based on the suggestions in #29, I have removed dist = 0 around line 373 which seems to have been used in the if statement later on. Instead, I have assigned the condition to a variable and have OR'ed that with the original condition.

This seems to work for me but I would love additional feedback from the original participants in the issue report (@ghost, @MathieuLoutre and @linlex).

[MathieuLoutre]

Hey! Great to see some work on this. Unfortunately I haven't used this library in over a year and I'm not sure my comments would be terribly helpful. I think I remember what the problem was and your fix is probably more readable than the one I suggested at the time (which required an understanding of the code structure). Basically, I haven't tried it, but it doesn't look bad :)