In commit 56addd6eeeb4e11f5a0af7093ca078e0f29140e0 the VLAN multicast list
handling was reworked.  Unfortunately, a variable initialization was missed,
and multicast over vlan devices has been broken since 2.6.23-rc1 (apparently
not too many people use this).  Trivial fix below, which might be a candidate
for -stable.

Phil

Signed-off-by: Phil Oester <kernel@linuxace.com>