fix: struct field alignment (#2632)

server/rpc_stream.go

@@ -11,13 +11,13 @@ import (
 
 // Implements the Streamer interface.
 type rpcStream struct {
-	sync.RWMutex
-	id      string
-	closed  bool
 	err     error
 	request Request
 	codec   codec.Codec
 	context context.Context
+	id      string
+	sync.RWMutex
+	closed bool
 }
 
 func (r *rpcStream) Context() context.Context {