mdns: remove unused variables
mdns: remove unused variables

src/mdns.c:159:12: warning: variable ‘vtime’ set but not used [-Wunused-but-set-variable]
src/mdns.c:339:23: warning: variable ‘origIp’ set but not used [-Wunused-but-set-variable]
src/mdns.c:334:22: warning: unused variable ‘src’ [-Wunused-variable]

Signed-off-by: Ferry Huberts <1f083df4a0371a8eba2ce71fc6b0e214b2551710@mindef.nl>

duydb2/olsr,diogomg/olsrd-binary-heap,tdz/olsrd,tdz/olsrd,tdz/olsrd,diogomg/olsrd,sebkur/olsrd,zioproto/olsrd,diogomg/olsrd,sebkur/olsrd,diogomg/olsrd,diogomg/olsrd,ninuxorg/olsrd,duydb2/olsr,zioproto/olsrd-gsoc2012,servalproject/olsr,acinonyx/olsrd,tdz/olsrd,duydb2/olsr,acinonyx/olsrd,sebkur/olsrd,zioproto/olsrd-gsoc2012,ninuxorg/olsrd,zioproto/olsrd-gsoc2012,cholin/olsrd,diogomg/olsrd-binary-heap,zioproto/olsrd,acinonyx/olsrd,ninuxorg/olsrd,diogomg/olsrd-binary-heap,ninuxorg/olsrd,servalproject/olsr,sebkur/olsrd,zioproto/olsrd,sebkur/olsrd,cholin/olsrd,servalproject/olsr,servalproject/olsr,zioproto/olsrd-gsoc2012,zioproto/olsrd-gsoc2012,sebkur/olsrd,nolith/olsrd,servalproject/olsr,diogomg/olsrd,acinonyx/olsrd,acinonyx/olsrd,duydb2/olsr,zioproto/olsrd-gsoc2012,diogomg/olsrd,duydb2/olsr,tdz/olsrd,nolith/olsrd,nolith/olsrd,nolith/olsrd,cholin/olsrd,nolith/olsrd,duydb2/olsr,cholin/olsrd,diogomg/olsrd-binary-heap,diogomg/olsrd-binary-heap,cholin/olsrd,diogomg/olsrd-binary-heap,duydb2/olsr,diogomg/olsrd-binary-heap,zioproto/olsrd,zioproto/olsrd,diogomg/olsrd,ninuxorg/olsrd,duydb2/olsr,servalproject/olsr