Large signal values are not parsed correctly

[martinl]

Large signal values (eg 57174604644354) are not parsed correctly after 859fea7

Here is a test and more information for one case with Subaru #702

[martinl]

It initially looked like integer overflow but may be something else:

[Adeeb Shihadeh]

Fixed in #702?

[Adeeb Shihadeh]

Is this still an issue?

[martinl]

Fixed by #702