6dc1a78ea normalized DFLAG 0/1 to -1 for every regular result,
contradicting the documented compact DPARAM forms and failing the
xblat1 ROTMG tests at points 1-2. The ELSE IF guard alone is enough
to fix the #244 clobber, so keep the normalization inside the loops.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>