route: fix output of "route -n -A inet6"
The output of the command "route -n -A inet6" may be corrupted
due to partially initialized structure snaddr6 in the function
INET6_displayroutes.
Signed-off-by: Tomas Paukrt <tomaspaukrt@email.cz>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>