fixed wrong NaN display for variable watchers

Thanks, Brian, for catching this glitch!

history.txt

@@ -1990,3 +1990,4 @@ ______
 131112
 ------
 * Blocks, BYOB, Store: customizable drop-down menus for input slots
+* Objects: fixed wrong NaN display for variable watchers

objects.js

@@ -124,7 +124,7 @@ PrototypeHatBlockMorph*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.objects = '2013-October-14';
+modules.objects = '2013-November-12';
 
 var SpriteMorph;
 var StageMorph;
@@ -6030,7 +6030,7 @@ WatcherMorph.prototype.update = function () {
         } else {
             newValue = this.target[this.getter]();
         }
-        num = parseFloat(newValue);
+        num = +newValue;
         if (!isNaN(num)) {
             newValue = Math.round(newValue * 1000000000) / 1000000000;
         }