log/修复WithBufferPool;

log/logsdk/logjson/option.go

@@ -17,6 +17,7 @@ type Option interface {
 func WithBufferPool(pool synchelper.BytesBufferPool) Option {
 	return optionFunc(func(cfg *config) {
 		cfg.pool = pool
+		cfg.hasPool = true
 	})
 }