basic_map_read_polylib: clear newly created divs
basic_map_read_polylib: clear newly created divs

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

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