isl_map_get_range_simple_fixed_box_hull: drop parameters from box size
isl_map_get_range_simple_fixed_box_hull: drop parameters from box size

It arguably makes little sense to have parameters
in any isl_multi_val object, but it is especially surprising
to see them in the size of a "fixed box".
Since parameters in the space of an isl_multi_val object
are usually ignored (because they cannot possibly have
an effect on the value of the object), removing
the parameters should not cause any major issues.

Signed-off-by: Sven Verdoolaege <dd860110a62b19214c4ee03aec0abffecb4e86b8@cerebras.net>

Meinersbur/isl,Meinersbur/isl,Meinersbur/isl,Meinersbur/isl