Fixed apm_read() return codes.
Fixed apm_read() return codes.

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