Blender Git Loki

Another bugreport, this time Basse: in NLA a position could sometimes be
set whilst the actual time was 1 frame after the strip. Appeared to be
a rounding error that didnt show in OSX.

Previously I added a threshold, to make sure strips are included when the
current frame is exactly on the end. That threshold now is smaller, and
I also made the fmod() to be done only on repeating strips.