Fixed compilation error on Win64.

src/spaces.cc

 // Copyright 2011 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 1919 matching lines @@
 
 
 void FreeListCategory::Reset() {
   top_ = NULL;
   end_ = NULL;
   available_ = 0;
 }
 
 
 intptr_t FreeListCategory::CountFreeListItemsInList(Page* p) {
-  intptr_t sum = 0;
+  int sum = 0;
   FreeListNode* n = top_;
   while (n != NULL) {
     if (Page::FromAddress(n->address()) == p) {
       FreeSpace* free_space = reinterpret_cast<FreeSpace*>(n);
       sum += free_space->Size();
     }
     n = n->next();
   }
   return sum;
 }
 
 
 intptr_t FreeListCategory::EvictFreeListItemsInList(Page* p) {
-  intptr_t sum = 0;
+  int sum = 0;
   FreeListNode** n = &top_;
   while (*n != NULL) {
     if (Page::FromAddress((*n)->address()) == p) {
       FreeSpace* free_space = reinterpret_cast<FreeSpace*>(*n);
       sum += free_space->Size();
       *n = (*n)->next();
     } else {
       n = (*n)->next_address();
     }
   }
@@ skipping 1020 matching lines @@
     object->ShortPrint();
     PrintF("\n");
   }
   printf(" --------------------------------------\n");
   printf(" Marked: %x, LiveCount: %x\n", mark_size, LiveBytes());
 }
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal