revid: if no data is provided to rtpSender.send() then we check if the rtpSenders chunk is not nil, if it is, then return error

revid/senders.go

@@ -29,6 +29,7 @@ LICENSE
 package revid
 
 import (
+	"errors"
 	"fmt"
 	"io"
 	"net"
@@ -392,13 +393,12 @@ func (s *rtpSender) send(d []byte) error {
 	var err error
 	if d != nil {
 		_, err = s.encoder.Write(d)
-	} else {
+	} else if s.chunk != nil {
 		_, err = s.chunk.WriteTo(s.encoder)
+	} else {
+		err = errors.New("no data provided, but rtpSender chunk is empty")
 	}
-	if err != nil {
-		return err
-	}
-	return nil
+	return err
 }
 
 func (s *rtpSender) release() {