Fix fluentd partial detection

The Partial property of the Logger message
was replaced by PLogMetaData, causing the build to fail.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

daemon/logger/fluentd/fluentd.go

@@ -163,7 +163,7 @@ func (f *fluentd) Log(msg *logger.Message) error {
 	for k, v := range f.extra {
 		data[k] = v
 	}
-	if msg.Partial {
+	if msg.PLogMetaData != nil {
 		data["partial_message"] = "true"
 	}