From 459c9a0a5af5a06593c7a19f519daf548e7e38f3 Mon Sep 17 00:00:00 2001
From: tombuildsstuff <git@ibuildstuff.co.uk>
Date: Mon, 27 Mar 2017 16:21:28 +0100
Subject: [PATCH] Returning a blank string if there's nothing to serialize

---
 helper/structure/structure.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/helper/structure/structure.go b/helper/structure/structure.go
index 3ebfb9acee..6ad12de62d 100644
--- a/helper/structure/structure.go
+++ b/helper/structure/structure.go
@@ -37,6 +37,11 @@ func ExpandJsonFromString(jsonString string) (map[string]interface{}, error) {
 }
 
 func FlattenJsonToString(input map[string]interface{}) (string, error) {
+
+	if len(input) == 0 {
+		return "", nil
+	}
+
 	result, err := json.Marshal(input)
 	if err != nil {
 		return "", err