isl_input.c: obj_read: error out on intermediate NULL results
isl_input.c: obj_read: error out on intermediate NULL results

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

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