RD53B Analysis bug fixes

Bugfixes:

• Fix data type bug in ptot table leading to (random?) 'jump' in scan_param_id from 0 to 4294967296 and to segmentation fault. 20201216_220429_analog_scan.h5
• Invalid ccol not catched: 20201220_225015_robust_digital_scan.h5
• Variables not properly defined

Todo:

• check dtype