When matching tracks, it was only checking for the minimum distance between the current frame and the last.  Need to also check that the minimum distance is the same between the last and current, otherwise ordering of the tracks in the list matters (doh).
When matching tracks, it was only checking for the minimum distance
between the current frame and the last.  Need to also check that the
minimum distance is the same between the last and current, otherwise
ordering of the tracks in the list matters (doh).

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome