Missing check on descriptors

[GarrettWarren]

without checking length, code throws an error. should be:
if (des1 is not None and len(des1)>2 and des2 is not None and len(des2)>2):

pidrone_pkg/scripts/localization_helper.py

Line 322 in 42019e0

if des1 is not None and des2 is not None:

pidrone_pkg/scripts/localization_helper.py

Line 352 in 42019e0

if des1 is not None and des2 is not None: