Fix to compile with kernel-2.4
Fix to compile with kernel-2.4

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