tc: don't accept qdisc 'handle' greater than ffff

since get_qdisc_handle() truncates the input value to 16 bit, return an
error and prompt "invalid qdisc ID" in case input 'handle' parameter needs
more than 16 bit to be stored.

Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Phil Sutter <phil@nwl.cc>
1 file changed