Fix pool to uint from int

pdu/pdu.go

@@ -27,7 +27,7 @@ type (
 )
 
 func (p *PDU_HEADER) Encode() (*[]uint8, error) {
-	buf := ByteBufferPool.GetBuffer(int(p.Size()))
+	buf := ByteBufferPool.GetBuffer(uint(p.Size()))
 	err := p.EncodeInto(buf)
 	return buf, err
 }