isl_schedule.c: fix typo in comment
isl_schedule.c: fix typo in comment

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

Distrotech/isl,serge-sans-paille/isl,VanirLLVM/toolchain_isl,nicolasvasilache/isl,BobSaget-Mod/libisl,nicolasvasilache/isl,BenzoSM/isl,tobig/isl,Meinersbur/isl,jleben/isl,pierrotdelalune/isl,tobig/isl,jleben/isl,PollyLabs/isl,Meinersbur/isl,SaberMod/isl-current,epowers/isl,simbuerg/isl,jleben/isl,SaberMod/isl-current,simbuerg/isl,PollyLabs/isl,cfx-next/toolchain_isl-upstream,nicolasvasilache/isl,cfx-next/toolchain_isl-upstream,abduld/isl,KangDroidSMProject/ISL,pierrotdelalune/isl,crossbuild/isl,pierrotdelalune/isl,BobSaget-Mod/libisl,cfx-next/toolchain_isl-upstream,Meinersbur/isl,evaautomation/isl,BenzoSM/isl,inducer/isl-mirror,inducer/isl-mirror,Meinersbur/isl,KangDroidSMProject/ISL,PollyLabs/isl,KangDroidSMProject/ISL,BobSaget-Mod/libisl,UBERTC/isl,SaberMod/isl-current,Distrotech/isl,crossbuild/isl,inducer/isl-mirror,BenzoSM/isl,VanirLLVM/toolchain_isl,evaautomation/isl,SaberMod/isl-current,jleben/isl,nicolasvasilache/isl,tobig/isl,Distrotech/isl,cfx-next/toolchain_isl-upstream,evaautomation/isl,crossbuild/isl,simbuerg/isl,serge-sans-paille/isl,VanirLLVM/toolchain_isl,BenzoSM/isl,crossbuild/isl,PollyLabs/isl,evaautomation/isl,UBERTC/isl,epowers/isl,nicolasvasilache/isl,pierrotdelalune/isl,Distrotech/isl,KangDroidSMProject/ISL,cfx-next/toolchain_isl-upstream,epowers/isl,BobSaget-Mod/libisl,KangDroidSMProject/ISL,inducer/isl-mirror,BobSaget-Mod/libisl,abduld/isl,UBERTC/isl,epowers/isl,tobig/isl,BenzoSM/isl,UBERTC/isl,Distrotech/isl,serge-sans-paille/isl,serge-sans-paille/isl,epowers/isl,simbuerg/isl,jleben/isl,VanirLLVM/toolchain_isl,pierrotdelalune/isl,PollyLabs/isl,abduld/isl,simbuerg/isl,abduld/isl,VanirLLVM/toolchain_isl,inducer/isl-mirror,serge-sans-paille/isl