isl_scheduler.c: carry_dependences: extract out carries_dependences
isl_scheduler.c: carry_dependences: extract out carries_dependences

This should clarify the code a bit.

Signed-off-by: Sven Verdoolaege <e5350bbed4977f5eb8ae1dc6abd9ae59d21ace75@kotnet.org>

PollyLabs/isl,nicolasvasilache/isl,inducer/isl-mirror,BenzoSM/isl,UBERTC/isl,nicolasvasilache/isl,inducer/isl-mirror,inducer/isl-mirror,PollyLabs/isl,UBERTC/isl,nicolasvasilache/isl,Meinersbur/isl,BenzoSM/isl,Meinersbur/isl,UBERTC/isl,tobig/isl,Meinersbur/isl,PollyLabs/isl,BenzoSM/isl,nicolasvasilache/isl,PollyLabs/isl,tobig/isl,PollyLabs/isl,BenzoSM/isl,BenzoSM/isl,Meinersbur/isl,tobig/isl,inducer/isl-mirror,tobig/isl,nicolasvasilache/isl,UBERTC/isl,inducer/isl-mirror