Arrays of length 0 yield implementation-defined behaviour, which causes
a compiler warning. In C, this was typically used to model
flexibly-sized array members trailing a struct. Here, length 0 actually
means it occupies no storage.

Hence, do not emit the _channels array when it would otherwise have a
length of 0.

This reverts merge request !269

This reverts merge request !261

Update on DSE generation: simulation and exploration should now better work: creation of new directories, adapted traces, better management of exceptions

code generation

DIPLODOCUS: Removing old system.out.println commands, and adding graphical sliders for exploration control

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