Do some work to handle empty descriptor lists that are loaded from a file. This is a bit weird in numpy ... the array has size 1, but it's contents are None.  Checking if myarray.any() is true seems to work.
Do some work to handle empty descriptor lists that are loaded from a file.
This is a bit weird in numpy ... the array has size 1, but it's contents are
None.  Checking if myarray.any() is true seems to work.


Former-commit-id: 7ec551c56eeba305f34f5d5e9da7b63d8fe44ee9
UASLab/ImageAnalysis