Bugfix LidarReader when only one frame:
Bugfix LidarReader when only one frame:

This can be due to :
- an infinity frame because unable to parse the pcap
- a small pcap containing only one frame

Kitware/VeloView,Kitware/VeloView,Kitware/VeloView,Kitware/VeloView,Kitware/VeloView