isl_vec.c: fix minor whitespace issue
isl_vec.c: fix minor whitespace issue

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