* fixed complaints from gcc -Wextra
* fixed complaints from gcc -Wextra

sebkur/olsrd,diogomg/olsrd-binary-heap,cholin/olsrd,ralisi/olsrd_cl_roam,servalproject/olsr,zioproto/olsrd,diogomg/olsrd,tdz/olsrd,diogomg/olsrd-binary-heap,sebkur/olsrd,acinonyx/olsrd,zioproto/olsrd,nolith/olsrd,zioproto/olsrd-gsoc2012,diogomg/olsrd,duydb2/olsr,diogomg/olsrd,nolith/olsrd,acinonyx/olsrd,servalproject/olsr,tdz/olsrd,duydb2/olsr,tdz/olsrd,sauloqueiroz/incremental-spf,cholin/olsrd,duydb2/olsr,zioproto/olsrd-gsoc2012,cl4u2/olsrd-wot-pgp,ninuxorg/olsrd,brabander/olsr,ninuxorg/olsrd,cl4u2/olsrd-wot-pgp,brabander/olsr,cl4u2/olsrd-wot-pgp,nolith/olsrd,nolith/olsrd,zioproto/olsrd,zioproto/olsrd-gsoc2012,sauloqueiroz/incremental-spf,ralisi/olsrd_cl_roam,brabander/olsr,sebkur/olsrd,diogomg/olsrd-binary-heap,duydb2/olsr,ninuxorg/olsrd,diogomg/olsrd-binary-heap,diogomg/olsrd,cl4u2/olsrd-wot-pgp,duydb2/olsr,tdz/olsrd,cholin/olsrd,zioproto/olsrd-gsoc2012,sebkur/olsrd,servalproject/olsr,diogomg/olsrd-binary-heap,ralisi/olsrd_cl_roam,cl4u2/olsrd-wot-pgp,ralisi/olsrd_cl_roam,acinonyx/olsrd,tdz/olsrd,servalproject/olsr,acinonyx/olsrd,servalproject/olsr,sebkur/olsrd,diogomg/olsrd-binary-heap,ninuxorg/olsrd,nolith/olsrd,sauloqueiroz/incremental-spf,cholin/olsrd,sauloqueiroz/incremental-spf,zioproto/olsrd,zioproto/olsrd-gsoc2012,sebkur/olsrd,acinonyx/olsrd,cholin/olsrd,diogomg/olsrd-binary-heap,zioproto/olsrd,zioproto/olsrd-gsoc2012,duydb2/olsr,duydb2/olsr,duydb2/olsr,brabander/olsr,ninuxorg/olsrd,diogomg/olsrd,diogomg/olsrd,diogomg/olsrd,servalproject/olsr