nameservice: fix wrong size argument
nameservice: fix wrong size argument

Coverity:
CID 739689 (#1 of 1): Wrong sizeof argument (SIZEOF_MISMATCH)
  Passing argument "ip" of type "union olsr_ip_addr *" and argument
  "8UL /* sizeof (ip) */" to function "memset(void *, int, size_t)" is
  suspicious. Did you intend to use "sizeof(*ip)" instead of "sizeof (ip)"?

Signed-off-by: Ferry Huberts <66e11f9f5d965b69497c7e73d5e808f8b13c1218@pelagic.nl>

sebkur/olsrd,sebkur/olsrd,ninuxorg/olsrd,diogomg/olsrd,zioproto/olsrd,zioproto/olsrd,sebkur/olsrd,diogomg/olsrd,acinonyx/olsrd,nolith/olsrd,sebkur/olsrd,tdz/olsrd,cholin/olsrd,cholin/olsrd,zioproto/olsrd,ninuxorg/olsrd,diogomg/olsrd,tdz/olsrd,tdz/olsrd,diogomg/olsrd-binary-heap,diogomg/olsrd,zioproto/olsrd,ninuxorg/olsrd,ninuxorg/olsrd,nolith/olsrd,diogomg/olsrd-binary-heap,ninuxorg/olsrd,sebkur/olsrd,diogomg/olsrd,nolith/olsrd,diogomg/olsrd,cholin/olsrd,acinonyx/olsrd,diogomg/olsrd-binary-heap,diogomg/olsrd-binary-heap,diogomg/olsrd-binary-heap,zioproto/olsrd,tdz/olsrd,acinonyx/olsrd,nolith/olsrd,tdz/olsrd,diogomg/olsrd-binary-heap,sebkur/olsrd,diogomg/olsrd,acinonyx/olsrd,nolith/olsrd,acinonyx/olsrd,cholin/olsrd,diogomg/olsrd-binary-heap,cholin/olsrd