batman-adv: fix NULL pointer dereferences

Was introduced with 4c8755d69cbde2ec464a39c932aed0a83f9ff89f
("batman-adv: Send multicast packets to nodes with a WANT_ALL flag")

Reported-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Acked-by: Antonio Quartulli <antonio@meshcoding.com>
Signed-off-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
1 file changed