Slightly clearer code. Marginally faster, too.
Slightly clearer code. Marginally faster, too.

svn path=/trunk/libcss/; revision=5854

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