gateway: minor simplification to olsr_delete_gateway_entry
gateway: minor simplification to olsr_delete_gateway_entry

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

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