Merge pull request #372 from mwitkow-io/bugfix/fix_stream_codec_errors

fix difference between unitary and stream codec error handling

rpc_util.go

@@ -187,6 +187,9 @@ func recv(p *parser, c Codec, m interface{}) error {
 	switch pf {
 	case compressionNone:
 		if err := c.Unmarshal(d, m); err != nil {
+			if rErr, ok := err.(rpcError); ok {
+				return rErr
+			} else {
 				return Errorf(codes.Internal, "grpc: %v", err)
 			}
 	default: