isl_space.c: move isl_space_factor_range down
isl_space.c: move isl_space_factor_range down

This will make it easier to change isl_space_factor_range
in the next commit.

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

tobig/isl,UBERTC/isl,KangDroidSMProject/ISL,simbuerg/isl,nicolasvasilache/isl,UBERTC/isl,BenzoSM/isl,Distrotech/isl,simbuerg/isl,KangDroidSMProject/ISL,Distrotech/isl,KangDroidSMProject/ISL,nicolasvasilache/isl,nicolasvasilache/isl,BenzoSM/isl,Distrotech/isl,BenzoSM/isl,tobig/isl,inducer/isl-mirror,simbuerg/isl,PollyLabs/isl,KangDroidSMProject/ISL,nicolasvasilache/isl,Distrotech/isl,inducer/isl-mirror,inducer/isl-mirror,simbuerg/isl,Distrotech/isl,evaautomation/isl,UBERTC/isl,tobig/isl,evaautomation/isl,PollyLabs/isl,UBERTC/isl,simbuerg/isl,inducer/isl-mirror,evaautomation/isl,Meinersbur/isl,PollyLabs/isl,evaautomation/isl,BenzoSM/isl,Meinersbur/isl,inducer/isl-mirror,Meinersbur/isl,BenzoSM/isl,tobig/isl,nicolasvasilache/isl,PollyLabs/isl,KangDroidSMProject/ISL,PollyLabs/isl,Meinersbur/isl