batman-adv: fix NULL pointer dereferences
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 <dd860110a62b19214c4ee03aec0abffecb4e86b8@narfation.org>
Signed-off-by: Marek Lindner <5760fd64db566c47bfb7ce809fea1d3e512880cf@neomailbox.ch>
Acked-by: Antonio Quartulli <a08f08bac39aeae6c9580ade7aa8387b5a0e7428@meshcoding.com>
Signed-off-by: Linus Lüssing <1dd561f221e05f08425aa0351cbf66864fb4804d@web.de>
Signed-off-by: Antonio Quartulli <a08f08bac39aeae6c9580ade7aa8387b5a0e7428@meshcoding.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs