[GiNaC-devel] Patch numerical evaluation alternating Euler sums of depth 1

[Stefan Weinzierl]

Hi,

I came along a small bug in the numerical evaluation of alternating Euler 
sums of depth 1, when in the input no lists are used:

> evalf(zeta({5},{1}));
1.0369277551433699263
> evalf(zeta(5,1));
1.0369277551433699263
> evalf(zeta({5},{-1}));
-0.972119770446909306
> evalf(zeta(5,-1));
zeta(5,-1)

The attached patch fixes the last case, so zeta(5,-1) is now also 
evaluated numerically.

  Best wishes,

    Stefan
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