Added -Wsign-compare
Added -Wsign-compare

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