From db3eee72b5798facb7bfeccd2551e1aef724b460 Mon Sep 17 00:00:00 2001
From: Nick O'Leary <nick.oleary@gmail.com>
Date: Mon, 4 Feb 2019 14:12:34 +0000
Subject: [PATCH] Do not convert falsey env vars to blank string

Only blank out undefined as that's what we've always done
---
 .../@node-red/runtime/lib/nodes/flows/Subflow.js      |  1 -
 packages/node_modules/@node-red/util/lib/util.js      | 11 ++++++-----
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/packages/node_modules/@node-red/runtime/lib/nodes/flows/Subflow.js b/packages/node_modules/@node-red/runtime/lib/nodes/flows/Subflow.js
index 4b121668e..b13100f30 100644
--- a/packages/node_modules/@node-red/runtime/lib/nodes/flows/Subflow.js
+++ b/packages/node_modules/@node-red/runtime/lib/nodes/flows/Subflow.js
@@ -38,7 +38,6 @@ class Subflow extends Flow {
      * @param {[type]} subflowInstance [description]
      */
     constructor(parent,globalFlow,subflowDef,subflowInstance) {
-         console.log(subflowDef);
         // console.log("CREATE SUBFLOW",subflowDef.id,subflowInstance.id);
         // console.log("SubflowInstance\n"+JSON.stringify(subflowInstance," ",2));
         // console.log("SubflowDef\n"+JSON.stringify(subflowDef," ",2));
diff --git a/packages/node_modules/@node-red/util/lib/util.js b/packages/node_modules/@node-red/util/lib/util.js
index a959e617c..3283a621b 100644
--- a/packages/node_modules/@node-red/util/lib/util.js
+++ b/packages/node_modules/@node-red/util/lib/util.js
@@ -442,22 +442,23 @@ function getSetting(node, name) {
 * @memberof @node-red/util_util
  */
 function evaluateEnvProperty(value, node) {
+    var result;
     if (/^\${[^}]+}$/.test(value)) {
         // ${ENV_VAR}
         var name = value.substring(2,value.length-1);
-        var val = getSetting(node, name);
-        return val ? val : "";
+        result = getSetting(node, name);
     } else if (!/\${\S+}/.test(value)) {
         // ENV_VAR
-        var val = getSetting(node, value);
-        return val ? val : "";
+        result = getSetting(node, value);
     } else {
         // FOO${ENV_VAR}BAR
         return value.replace(/\${([^}]+)}/g, function(match, name) {
             var val = getSetting(node, name);
-            return (val ? val : "");
+            return (val === undefined)?"":val;
         });
     }
+    return (result === undefined)?"":result;
+
 }