[Nitro] Facets Aspects problem

[nyarly at gmail.com]

In trying to reduce the amount of eval'd code in Og I ran across the
following fascinating snippet in facets/more/aspects.rb:

target.instance_method(m).arity.times { |i| args << "a#{i}" }

Which is fine, unless the method takes a variable number of arguments,
in which case, the advised version of the method suddenly takes no
arguments.

Can I suggest:

arity = target.instance_method(m).arity
if arity < 0
  (-(arity + 1).times{ |i| args << "a#{i}" }
  args << "*argv"
else
  arity.times { |i| args << "a#{i}" }
end

Working on a workaround...