morphic: enabled zero values for menu selection entries

HISTORY.md

@@ -4,6 +4,7 @@
 
 ### 2020-10-20
 * added "pie chart" option to PLOT command in the frequency distribution analysis library
+* morphic: enabled zero values for menu selection entries
 
 ### 2020-10-15
 * new dev version

snap.html

@@ -5,7 +5,7 @@
         <meta name="viewport" content="width=device-width, initial-scale=1">
         <title>Snap! 6.2.5 - dev - Build Your Own Blocks</title>
         <link rel="icon" href="src/favicon.ico">
-        <script src="src/morphic.js?version=2020-09-12"></script>
+        <script src="src/morphic.js?version=2020-10-20"></script>
         <script src="src/symbols.js?version=2020-10-07"></script>
         <script src="src/widgets.js?version=2020-10-06"></script>
         <script src="src/blocks.js?version=2020-10-09"></script>

src/morphic.js

@@ -1280,7 +1280,7 @@
 
 /*global window, HTMLCanvasElement, FileReader, Audio, FileList, Map*/
 
-var morphicVersion = '2020-September-12';
+var morphicVersion = '2020-October-20';
 var modules = {}; // keep track of additional loaded modules
 var useBlurredShadows = true;
 
@@ -7961,7 +7961,7 @@ MenuMorph.prototype.addItem = function (
     */
     this.items.push([
         verbatim ? labelString || 'close' : localize(labelString || 'close'),
-        action || nop,
+        action === 0 ? 0 : action || nop,
         hint,
         color,
         bold || false,
@@ -9724,7 +9724,7 @@ TriggerMorph.prototype.init = function (
 ) {
     // additional properties:
     this.target = target || null;
-    this.action = action || null;
+    this.action = action === 0 ? 0 : action|| null;
     this.doubleClickAction = doubleClickAction || null;
     this.environment = environment || null;
     this.labelString = labelString || ' ';