minor style change

commands.go

@@ -127,8 +127,9 @@ type dropMeasurementCommand struct {
 type createMeasurementSubcommand struct {
 	Name   string              `json:"name"`
 	Tags   []map[string]string `json:"tags"`
-	marshaledTags map[string]struct{} // local cache...don't marshal
 	Fields []*Field            `json:"fields"`
+
+	marshaledTags map[string]struct{} // local cache...don't marshal
 }
 
 type createMeasurementsIfNotExistsCommand struct {