new behaviour of nargoutchk

[Carnë Draug]

Hi everyone,

it seems that matlab has completely changed the behaviour of
nargoutchk. It used to return a string if the the value of nargout on
the caller was outside min and max values. Now it fails and returns an
error if it's not between those two values (does nothing otherwise). I
have just implemented narginchk and submitted it to the patch tracker.
I can do the same for nargoutchk. But this would be non-backwards
compatible.

I could check nargout inside nargoutchk and if it's expecting
something, behave as before, otherwise, behave by the new style. What
do you think is the best way here?

Carnë