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Which got accidentally removed in the previous commit

Cppcheck complained there's an uninitialized variable in constructor.
This is mostly a false positive (the value is not used before being
assigned), but fix it anyway to make it silent.

These make distcheck fail on a number of systems (they have built-in disabling code for a number of other systems). See ticket #2479

Also change type of exception thrown by packX() if universe is incorrect.

a number directly followed by ;comment was not parsed correctly

Conflicts:
	src/lib/datasrc/datasrc_messages.mes

Also adjust affected tests accordingly.

We never have a chain of the transitions. We only do start and zero or
one handle on the returned one. Simplify handle to return void, not
NULL.

Besides simplification, it allows testing without fake states (TBD) - we
had no real state to test the multiple transitions.