isl_basic_map_reset: directly mark result as final
isl_basic_map_reset: directly mark result as final

Since this function does not modify any constraints,
there is no need to look for any obviously redundant integer divisions.

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

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