fix: Fix memory errors revealed by valgrind in position reader
fix: Fix memory errors revealed by valgrind in position reader

Kitware/VeloView,Kitware/VeloView,Kitware/VeloView,Kitware/VeloView,frizaro/Veloview,frizaro/Veloview,frizaro/Veloview,frizaro/Veloview,Kitware/VeloView