Implement optional JPEG2000 codec adapter (#40)

crates/libremetaverse-structured-data/src/model.rs

@@ -1694,7 +1694,7 @@ fn object_to_osd(value: Object) -> Result<OSD, Error> {
         Object::Vector4(value) => OSD::from_vector4(value)?,
         Object::Quaternion(value) => OSD::from_quaternion(value)?,
         Object::Color4(value) => OSD::from_color4(value)?,
-        Object::Matrix4(_) => OSD::Undefined,
+        Object::Matrix4(_) | Object::Opaque(_) => OSD::Undefined,
     })
 }