isl_fold.c: fix typo
isl_fold.c: fix typo

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

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