fix: prefix_to_netmask(32) on ipv4 returns err
fix: prefix_to_netmask(32) on ipv4 returns err

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