Fixed SignedMSWLSW VI for the loggers, Bump LJLogUD and LJStreamUD to v1.22

[sjarman28]

The SignedMSWLSW scaling function was previously returning a U32 representation, but it now returns an I32 representation (signed 32-bit int).

[sjarman28]

The last commit changes the SignedMSWLSW VI to input doubles then cast them as U16. This might look goofy, but it is important to prevent overflow in the I32 representation.

Integers are allowed to overflow in LabVIEW and they don't throw errors when overflow happens. The easiest way to handle overflow is by interpreting the MSW and LSW values as a double then casting as the int representation you want. In LabVIEW it is well defined that a double cast to int will always result in a value within the int representation range. Doubles greater than can be represented with the int are interpreted as the max value (for example, 65535 is the max value of a U16) and doubles smaller than can be represented with the int are interpreted as the min value (for example, 0 for unsigned int representations).