[Bug-readline] completion with space in the dir/file name

[gianp]

hello list,
i'm using the readlib in my application to make a shell, it works ok, but
if i've a dir or file name containing space like: "name dir/", the readlib
completes the name, but if i want to continue with <TAB> for complete the
files in the "name dir/" dir, that doesn't work, i think the code doesn't
add an escape char for special chars like space.
I use rl_completion_matches for handle a command generator and
rl_attempted_completion_function for setting the function for completion,
how can i solve this problem?

thanks!