isl_affine_hull.c: affine_hull_with_cone: plug memory leak on error path
isl_affine_hull.c: affine_hull_with_cone: plug memory leak on error path

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

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