Assertions on return value of CgosLibInitialize cause panics in virtualized environments

[Farmadupe]

When a congatec board controller is not present, CgosLibInitialize returns zero when called (from browsing the sources it seems that despite this name, this function attempts to communicate with an underlying congatec board controller)

The below assertion in congatec.rs prevents cgos-rs from being used in virtualized environments (e.g. virtual machines)

assert_ne!(unsafe { CgosLibInitialize() }, 0);