isl_input.c: clean up read_disjuncts
isl_input.c: clean up read_disjuncts

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

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