Fix one off error.

src/objects.h

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2304 matching lines @@
 //   [2]: current cache size
 //   [3]: dummy field.
 // The rest of array are key/value pairs.
 class JSFunctionResultCache: public FixedArray {
  public:
   static const int kFactoryIndex = 0;
   static const int kFingerIndex = kFactoryIndex + 1;
   static const int kCacheSizeIndex = kFingerIndex + 1;
   static const int kDummyIndex = kCacheSizeIndex + 1;
   static const int kEntriesIndex = kDummyIndex + 1;
+
+  static const int kEntrySize = 2;  // key + value
 };
 
 
 // ByteArray represents fixed sized byte arrays.  Used by the outside world,
 // such as PCRE, and also by the memory allocator and garbage collector to
 // fill in free blocks in the heap.
 class ByteArray: public Array {
  public:
   // Setter and getter.
   inline byte get(int index);
@@ skipping 2796 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_