fix: fix grpc compressor mcache free panic when data is empty (#1364)

pkg/remote/codec/grpc/grpc_compress.go

@@ -23,10 +23,10 @@ import (
 	"errors"
 	"io"
 
-	"github.com/cloudwego/kitex/pkg/rpcinfo"
-
 	"github.com/bytedance/gopkg/lang/mcache"
 
+	"github.com/cloudwego/kitex/pkg/rpcinfo"
+
 	"github.com/cloudwego/kitex/pkg/remote/codec/protobuf/encoding"
 
 	"github.com/cloudwego/kitex/pkg/remote"
@@ -63,7 +63,9 @@ func decodeGRPCFrame(ctx context.Context, in remote.ByteBuffer) ([]byte, error)
 }
 
 func compress(compressor encoding.Compressor, data []byte) ([]byte, error) {
-	defer mcache.Free(data)
+	if len(data) != 0 {
+		defer mcache.Free(data)
+	}
 	cbuf := &bytes.Buffer{}
 	z, err := compressor.Compress(cbuf)
 	if err != nil {