empty map validate fix

validator_instance.go

@@ -156,6 +156,9 @@ const omitemptyPrefix = "__omitempty__"
 // validation validation information via context.Context.
 func (v Validate) ValidateMapCtx(ctx context.Context, data map[string]interface{}, rules map[string]interface{}) map[string]interface{} {
 	errs := make(map[string]interface{})
+	if len(data) == 0 {
+		return errs
+	}
 Loop:
 	for field, rule := range rules {
 		if strings.HasPrefix(field, omitemptyPrefix) == true {