From f78190ef616e7918baf8d0eba65e269125a150b8 Mon Sep 17 00:00:00 2001
From: Xavier Cazin <xcazin@immateriel.fr>
Date: Thu, 15 Mar 2018 15:12:33 +0100
Subject: [PATCH] Allow empty string as value parameter in SetWidget (#3164)

When occuring in a tiddler named "New Tiddler", the following construct should return ++ instead of +[[New Tiddler]]+

<$set name="myVariable" filter="[all[current]field:title[New Tiddler]]" value="">
+<<myVariable>>+
</$set>
---
 core/modules/widgets/setvariable.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/modules/widgets/setvariable.js b/core/modules/widgets/setvariable.js
index 3da727066..dda00af89 100755
--- a/core/modules/widgets/setvariable.js
+++ b/core/modules/widgets/setvariable.js
@@ -70,7 +70,7 @@ SetWidget.prototype.getValue = function() {
 		}
 	} else if(this.setFilter) {
 		var results = this.wiki.filterTiddlers(this.setFilter,this);
-		if(!this.setValue) {
+		if(this.setValue == null) {
 			var select;
 			if(this.setSelect) {
 				select = parseInt(this.setSelect,10);