batman-adv: fix tt_local_reset_flags() function

batman-adv: fix tt_local_reset_flags() function

Currently the counter of tt_local_entry structures (tt_local_num) is incremented
each time the tt_local_reset_flags() is invoked causing the node to send wrong
TT_REPONSE packets containing a copy of non-initialised memory thus corrupting
other nodes global translation table and making higher level communication
impossible.

Reported-by: Junkeun Song <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
Acked-by: Junkeun Song <[email protected]>
Signed-off-by: Marek Lindner <[email protected]>