Fix 64-bit VS2010 build

test/cctest/compiler/test-instruction-selector.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "test/cctest/compiler/instruction-selector-tester.h"
 
 using namespace v8::internal;
 using namespace v8::internal::compiler;
 
 TEST(InstructionSelectionReturnZero) {
   InstructionSelectorTester m(InstructionSelectorTester::kInternalMode);
   m.Return(m.Int32Constant(0));
   m.SelectInstructions();
-  CHECK_EQ(2, m.code.size());
+  CHECK_EQ(2, static_cast<int>(m.code.size()));
   CHECK_EQ(kArchNop, m.code[0]->opcode());
   CHECK_EQ(kArchRet, m.code[1]->opcode());
-  CHECK_EQ(1, m.code[1]->InputCount());
+  CHECK_EQ(1, static_cast<int>(m.code[1]->InputCount()));
 }