[AMR] a warning should be raised if the refine is not possible due to integer limits

[tdavidcl]

Shamrock/src/shammodels/ramses/src/modules/AMRGridRefinementHandler.cpp

Line 441 in 1d4d108

should_refine = should_refine && (high_bound.x() - low_bound.x() > AMRBlock::Nside);

When this is triggered i should raise a warning using an atomic