fixed part of #154 - prevent costumes from being drawn while they are loading

prevents an occasional DOM error saying "an attempt was made to use an
object that is not, or is no longer, usable" when loading a project
that has costumes

history.txt

@@ -1910,3 +1910,5 @@ ______
 ------
 * Cloud: encodeDict() fix and new parseDict() method - used for accessing shared projects
 * GUI: fixed #119, #149 (accessing a shared projects requires lowercasing the username)
+* Portuguese translation update for SPLIT block, thanks, Manuel!
+* Store, Objects: prevent costumes from being drawn while they are loading, fixes parts of #154

objects.js

@@ -124,7 +124,7 @@ PrototypeHatBlockMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.objects = '2013-September-16';
+modules.objects = '2013-September-17';
 
 var SpriteMorph;
 var StageMorph;
@@ -1248,6 +1248,8 @@ SpriteMorph.prototype.drawNew = function () {
         currentCenter = this.center(),
         facing, // actual costume heading based on my rotation style
         isFlipped,
+        isLoadingCostume = this.costume &&
+            typeof this.costume.loaded === 'function',
         pic, // (flipped copy of) actual costume based on my rotation style
         stageScale = this.parent instanceof StageMorph ?
                 this.parent.scale : 1,
@@ -1257,7 +1259,8 @@ SpriteMorph.prototype.drawNew = function () {
         shift,
         corner,
         costumeExtent,
-        ctx;
+        ctx,
+        handle;
 
     if (this.isWarped) {
         this.wantsRedraw = true;
@@ -1271,7 +1274,7 @@ SpriteMorph.prototype.drawNew = function () {
             isFlipped = true;
         }
     }
-    if (this.costume) {
+    if (this.costume && !isLoadingCostume) {
         pic = isFlipped ? this.costume.flipped() : this.costume;
 
         // determine the rotated costume's bounding box
@@ -1328,6 +1331,17 @@ SpriteMorph.prototype.drawNew = function () {
         this.setCenter(currentCenter, true); // just me
         SpriteMorph.uber.drawNew.call(this, facing);
         this.rotationOffset = this.extent().divideBy(2);
+        if (isLoadingCostume) { // retry until costume is done loading
+            handle = setInterval(
+                function () {
+                    myself.changed();
+                    myself.drawNew();
+                    myself.changed();
+                    clearInterval(handle);
+                },
+                100
+            );
+        }
     }
     this.version = Date.now();
 };

store.js

@@ -61,7 +61,7 @@ SyntaxElementMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.store = '2013-August-10';
+modules.store = '2013-September-17';
 
 
 // XML_Serializer ///////////////////////////////////////////////////////
@@ -673,6 +673,7 @@ SnapSerializer.prototype.loadCostumes = function (object, model) {
             } else {
                 costume.loaded = function () {
                     object.wearCostume(costume);
+                    this.loaded = true;
                 };
             }
         }