mersenne_twister::seed takes iterator by reference

[rminsk]

The member template 
boost::random::merseene_twister:seed looks likes

template<class It>
void seed(It &first, It last)

Should it take a reference to first?

[jmaurer]

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Yes.

The idea is that compound generators such as xor_combine<>
can recursively seed their constituents.  And that mean that
any individual generator must indicate how much "seed space"
it has consumed, so that the compound generator can pass the
rest to the next constituent generator.

The library working group of the C++ committee didn't like
the idea of passing iterator "first" by reference, so the
official TR interface is now back to the seed(Generator&)
still present in the sources.

Jens Maurer