'test moment' fails on x36

[Stefan Mahr]

Rik,

with changeset http://hg.savannah.gnu.org/hgweb/octave/rev/58b39152b0f6
you modified the test cases, e.g. setting the tolerance to zero. This
works ok with my x86-64, but not for my x86.

This is what I get:

octave-cli:55> x=[0.4 0.6 0.4;0.4 0.0 0.2;0.9 0.7 0.1];
octave-cli:56>  assert (moment (x,2), meansq (center (x)));
error: ASSERT errors for:  assert (moment (x, 2),meansq (center (x)))

Location | Observed | Expected | Reason
  (1)      0.055556   0.055556   Abs err 6.9389e-18 exceeds tol 0
  (3)      0.015556   0.015556   Abs err 1.7347e-18 exceeds tol 0




Stefan