isl_aff.c: fix typo in comment
isl_aff.c: fix typo in comment

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

VanirLLVM/toolchain_isl,jleben/isl,tobig/isl,UBERTC/isl,nicolasvasilache/isl,crossbuild/isl,abduld/isl,jleben/isl,SaberMod/isl-current,BobSaget-Mod/libisl,evaautomation/isl,KangDroidSMProject/ISL,BenzoSM/isl,simbuerg/isl,PollyLabs/isl,nicolasvasilache/isl,simbuerg/isl,Meinersbur/isl,PollyLabs/isl,inducer/isl-mirror,SaberMod/isl-current,inducer/isl-mirror,BenzoSM/isl,KangDroidSMProject/ISL,evaautomation/isl,PollyLabs/isl,VanirLLVM/toolchain_isl,BobSaget-Mod/libisl,simbuerg/isl,Distrotech/isl,PollyLabs/isl,Distrotech/isl,VanirLLVM/toolchain_isl,inducer/isl-mirror,UBERTC/isl,crossbuild/isl,abduld/isl,crossbuild/isl,KangDroidSMProject/ISL,BobSaget-Mod/libisl,tobig/isl,Meinersbur/isl,crossbuild/isl,evaautomation/isl,jleben/isl,Distrotech/isl,nicolasvasilache/isl,BobSaget-Mod/libisl,BobSaget-Mod/libisl,BenzoSM/isl,simbuerg/isl,jleben/isl,PollyLabs/isl,VanirLLVM/toolchain_isl,VanirLLVM/toolchain_isl,tobig/isl,BenzoSM/isl,UBERTC/isl,nicolasvasilache/isl,Meinersbur/isl,evaautomation/isl,SaberMod/isl-current,tobig/isl,Meinersbur/isl,abduld/isl,KangDroidSMProject/ISL,inducer/isl-mirror,abduld/isl,nicolasvasilache/isl,Distrotech/isl,BenzoSM/isl,Distrotech/isl,simbuerg/isl,SaberMod/isl-current,jleben/isl,KangDroidSMProject/ISL,UBERTC/isl,inducer/isl-mirror