Fix a sign-compare error to make gcc 4.9.2 happy.

src/interpreter/bytecode-array-builder.cc

 // Copyright 2015 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 "src/interpreter/bytecode-array-builder.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
@@ skipping 58 matching lines @@
   Handle<BytecodeArray> output =
       factory->NewBytecodeArray(bytecode_size, &bytecodes_.front(), frame_size,
                                 parameter_count_, constant_pool);
   bytecode_generated_ = true;
   return output;
 }
 
 
 template <size_t N>
 void BytecodeArrayBuilder::Output(uint8_t(&bytes)[N]) {
-  DCHECK_EQ(Bytecodes::NumberOfOperands(Bytecodes::FromByte(bytes[0])), N - 1);
+  DCHECK_EQ(Bytecodes::NumberOfOperands(Bytecodes::FromByte(bytes[0])),
+            static_cast<int>(N) - 1);
   last_bytecode_start_ = bytecodes()->size();
   for (int i = 1; i < static_cast<int>(N); i++) {
     DCHECK(OperandIsValid(Bytecodes::FromByte(bytes[0]), i - 1, bytes[i]));
   }
   bytecodes()->insert(bytecodes()->end(), bytes, bytes + N);
 }
 
 
 void BytecodeArrayBuilder::Output(Bytecode bytecode, uint8_t operand0,
                                   uint8_t operand1, uint8_t operand2) {
@@ skipping 514 matching lines @@
 
 Register TemporaryRegisterScope::NewRegister() {
   count_++;
   last_register_index_ = builder_->BorrowTemporaryRegister();
   return Register(last_register_index_);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8