fixed stage-size settings bug

HISTORY.md

@@ -79,6 +79,9 @@
     * German
     * French
 
+### 2019-05-21
+* Objects: fixed stage-size settings bug
+
 ### 2019-05-20
 * Objects, Blocks added plus- and minus- keys to key pressed predicate and hat block 
 * Objects: refactored projection layer update

snap.html

@@ -8,7 +8,7 @@
         <script type="text/javascript" src="src/widgets.js?version=2019-04-05"></script>
         <script type="text/javascript" src="src/blocks.js?version=2019-05-20"></script>
         <script type="text/javascript" src="src/threads.js?version=2019-05-15"></script>
-        <script type="text/javascript" src="src/objects.js?version=2019-05-20"></script>
+        <script type="text/javascript" src="src/objects.js?version=2019-05-21"></script>
         <script type="text/javascript" src="src/gui.js?version=2019-05-09"></script>
         <script type="text/javascript" src="src/paint.js?version=2019-02-22"></script>
         <script type="text/javascript" src="src/lists.js?version=2019-04-27"></script>

src/objects.js

@@ -84,7 +84,7 @@ BlockEditorMorph, BlockDialogMorph, PrototypeHatBlockMorph, localize,
 TableMorph, TableFrameMorph, normalizeCanvas, BooleanSlotMorph, HandleMorph,
 AlignmentMorph, Process, XML_Element, VectorPaintEditorMorph*/
 
-modules.objects = '2019-May-20';
+modules.objects = '2019-May-21';
 
 var SpriteMorph;
 var StageMorph;
@@ -7348,9 +7348,11 @@ StageMorph.prototype.getVideoImage = function () {
 };
 
 StageMorph.prototype.stopVideo = function() {
-    this.projectionSource.stream.getTracks().forEach(
-        function (track) {track.stop(); }
-    );
+    if (this.projectionSource && this.projectionSource.stream) {
+        this.projectionSource.stream.getTracks().forEach(
+            function (track) {track.stop(); }
+        );
+    }
     this.videoMotion = null;
 };