isl_coalesce.c: fix typo in comment
isl_coalesce.c: fix typo in comment

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