Use string_type in Message::length.
Use string_type in Message::length.

umlaeute/liblo,johne53/MB3Liblo,island-org/liblo,tuscland/liblo,tuscland/liblo,radarsat1/liblo,umlaeute/liblo,fsateler/liblo,johne53/MB3Liblo,radarsat1/liblo,johne53/MB3Liblo,umlaeute/liblo,kneitinger/liblo,island-org/liblo,fsateler/liblo,kneitinger/liblo,kneitinger/liblo,radarsat1/liblo,island-org/liblo,fsateler/liblo,tuscland/liblo,johne53/MB3Liblo