sa_common.py: check if .view can be used for parsing

[wx4stg]

performance improvement and "just for fun": converting an array of bytes into a single floating point number is possible with no memcpy: https://github.com/wx4stg/radiosonde-decoders/blob/d2b3bbe540ab4ee5d2260dded96bbfb767d24e97/imet4.py#L71

Could potentially be used in parsing SA clock and ADC reading