Fix another gcc 4.9.2 sign-compare error.

src/interpreter/bytecode-array-builder.cc

Index: src/interpreter/bytecode-array-builder.cc
diff --git a/src/interpreter/bytecode-array-builder.cc b/src/interpreter/bytecode-array-builder.cc
index 9c937d74370d3cde35fcb47caa36239d048b6137..2eb39dbc5673cc023e7356866a3dd90bd78abc7c 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -77,7 +77,7 @@ Handle<BytecodeArray> BytecodeArrayBuilder::ToBytecodeArray() {
 
 template <size_t N>
 void BytecodeArrayBuilder::Output(Bytecode bytecode, uint32_t(&operands)[N]) {
-  DCHECK_EQ(Bytecodes::NumberOfOperands(bytecode), N);
+  DCHECK_EQ(Bytecodes::NumberOfOperands(bytecode), static_cast<int>(N));
   last_bytecode_start_ = bytecodes()->size();
   bytecodes()->push_back(Bytecodes::ToByte(bytecode));
   for (int i = 0; i < static_cast<int>(N); i++) {