Add missing initialization of a couple of variables which makes...

src/objects.cc

Index: src/objects.cc
===================================================================
--- src/objects.cc	(revision 4751)
+++ src/objects.cc	(working copy)
@@ -2700,7 +2700,7 @@
     return Heap::undefined_value();
   }
 
-  uint32_t index;
+  uint32_t index = 0;
   bool is_element = name->AsArrayIndex(&index);
   if (is_element && IsJSArray()) return Heap::undefined_value();
 
@@ -2958,7 +2958,7 @@
 
   // Make the lookup and include prototypes.
   int accessor_index = is_getter ? kGetterIndex : kSetterIndex;
-  uint32_t index;
+  uint32_t index = 0;
   if (name->AsArrayIndex(&index)) {
     for (Object* obj = this;
          obj != Heap::null_value();