let “switch to costume” block accept actual costume objects (in addition to names and numbers)

history.txt

@@ -2108,3 +2108,4 @@ ______
 ------
 * Objects: experimental “wardrobe” and “jukebox” reporters in dev mode
 * Blocks, Objects: display costume thumbnails in speech/thought/value bubbles and watcher cells
+* Objects: let “switch to costume” block accept actual costume objects (in addition to names and numbers)

objects.js

@@ -2291,6 +2291,11 @@ SpriteMorph.prototype.doWearPreviousCostume = function () {
 };
 
 SpriteMorph.prototype.doSwitchToCostume = function (id) {
+    if (id instanceof Costume) { // allow first-class costumes
+        this.wearCostume(id);
+        return;
+    }
+
     var num,
         arr = this.costumes.asArray(),
         costume;