Add integer casts to make v8 compile without warnings on 64-bit Visual Studio

src/serialize.cc

 // Copyright 2006-2008 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 834 matching lines @@
     }
   }
   ASSERT_EQ(current, limit);
 }
 
 
 void SnapshotByteSink::PutInt(uintptr_t integer, const char* description) {
   const int max_shift = ((kPointerSize * kBitsPerByte) / 7) * 7;
   for (int shift = max_shift; shift > 0; shift -= 7) {
     if (integer >= static_cast<uintptr_t>(1u) << shift) {
-      Put(((integer >> shift) & 0x7f) | 0x80, "IntPart");
+      Put((static_cast<int>((integer >> shift)) & 0x7f) | 0x80, "IntPart");
     }
   }
-  PutSection(integer & 0x7f, "IntLastPart");
+  PutSection(static_cast<int>(integer & 0x7f), "IntLastPart");
 }
 
 #ifdef DEBUG
 
 void Deserializer::Synchronize(const char* tag) {
   int data = source_->Get();
   // If this assert fails then that indicates that you have a mismatch between
   // the number of GC roots when serializing and deserializing.
   ASSERT_EQ(SYNCHRONIZE, data);
   do {
@@ skipping 483 matching lines @@
       fullness_[space] = RoundUp(fullness_[space], Page::kPageSize);
     }
   }
   int allocation_address = fullness_[space];
   fullness_[space] = allocation_address + size;
   return allocation_address;
 }
 
 
 } }  // namespace v8::internal