Trivial optimisation of HSL->RGB conversion
Trivial optimisation of HSL->RGB conversion

svn path=/trunk/libcss/; revision=11456

servo/libcss,servo/libcss,zhuyadong/libcss,servo/libcss,zhuyadong/libcss,prepare/netsurf_libcss,zhuyadong/libcss,prepare/netsurf_libcss,prepare/netsurf_libcss