One more Windows compilation fix after r15750

src/circular-queue.cc

 // Copyright 2010 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 56 matching lines @@
   producer_pos_->enqueue_pos = buffer_;
 
   consumer_pos_ = reinterpret_cast<ConsumerPosition*>(
       reinterpret_cast<byte*>(producer_pos_) + kProcessorCacheLineSize);
   ASSERT(reinterpret_cast<byte*>(consumer_pos_ + 1) <=
          positions_ + positions_size);
   consumer_pos_->dequeue_chunk_pos = buffer_;
   // The distance ensures that producer and consumer never step on
   // each other's chunks and helps eviction of produced data from
   // the CPU cache (having that chunk size is bigger than the cache.)
-  const int producer_consumer_distance = (2 * chunk_size_);
+  const size_t producer_consumer_distance = (2 * chunk_size_);
   consumer_pos_->dequeue_chunk_poll_pos = buffer_ + producer_consumer_distance;
   consumer_pos_->dequeue_pos = NULL;
 }
 
 
 SamplingCircularQueue::~SamplingCircularQueue() {
   DeleteArray(positions_);
   DeleteArray(buffer_);
 }
 
@@ skipping 28 matching lines @@
 }
 
 
 void SamplingCircularQueue::FlushResidualRecords() {
   // Eliminate producer / consumer distance.
   consumer_pos_->dequeue_chunk_poll_pos = consumer_pos_->dequeue_chunk_pos;
 }
 
 
 } }  // namespace v8::internal