Bug 380833: AllocSlot now insists on the new slot being already set to void. r=brendan

js/src/jsobj.c

@@ -2814,13 +2814,8 @@ js_AllocSlot(JSContext *cx, JSObject *obj, uint32 *slotp)
         return JS_FALSE;
     }
 
-#ifdef DEBUG
-#if JS_BYTES_PER_WORD == 8
-    STOBJ_SET_SLOT(obj, map->freeslot, (jsval)0xddddddddddddddd8L);
-#else
-    STOBJ_SET_SLOT(obj, map->freeslot, (jsval)0xddddddd8);
-#endif
-#endif
+    /* ReallocSlots or js_FreeSlot should set the free slots to void. */   
+    JS_ASSERT(STOBJ_GET_SLOT(obj, map->freeslot) == JSVAL_VOID);
     *slotp = map->freeslot++;
     return JS_TRUE;
 }