#89 test stk_sampcrit_ehvi_eval: One unit test fails in Octave 4.4

[Julien Bect]

Two unit tests of test stk_sampcrit_ehvi_eval fail in Octave 4.4:

>> test stk_sampcrit_ehvi_eval.m
***** test  % no observation -> EHVI wrt zr
 zp_mean = [0.6 0.6];  zp_std = 0.01 * [1 1];  zi = [];
 EHVI = stk_sampcrit_ehvi_eval (zp_mean, zp_std, zi, zr);
 assert (stk_isequal_tolabs (EHVI, (1 - 0.6)^2, 1e-12));
!!!!! test failed
structure has no member 'xmin'
shared variables   scalar structure containing the fields:

    zr =

       1   1

    zi =

       0.25000   0.75000
       0.50000   0.50000
       0.75000   0.25000

[Julien Bect]

This is a problem in Octave 4.4: https://savannah.gnu.org/bugs/index.php?54096.

Luckily, it will be easily worked around.

[Julien Bect]

Problem solved:
https://sourceforge.net/p/kriging/hg/ci/81035abf760b69d06648b84f5b0a7de1b655ab74/