isl_dim_replace: fix handling of nested spaces
isl_dim_replace: fix handling of nested spaces

5ad911e (isl_dim_drop: also drop parameters from nested spaces,
Sat Oct 16 14:41:22 2010 +0200) changed isl_dim_drop to also
drop parameters from nested spaces, but it didn't change isl_dim_add
accordingly, breaking isl_dim_replace on isl_dims with nested spaces.

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

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