Fix VS2005 build.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 88169a4537240ca49a574a098149e10f8637b145..9f4a789724082adf0d3e7f9c34b671ddbe80109f 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -5080,8 +5080,8 @@ void LCodeGen::EmitDeepCopy(Handle<JSObject> object,
       for (int i = 0; i < elements_length; i++) {
         int64_t value = double_array->get_representation(i);
         // We only support little endian mode...
-        int32_t value_low = value & 0xFFFFFFFF;
-        int32_t value_high = value >> 32;
+        int32_t value_low = static_cast<int32_t>(value & 0xFFFFFFFF);
+        int32_t value_high = static_cast<int32_t>(value >> 32);
         int total_offset =
             elements_offset + FixedDoubleArray::OffsetOfElementAt(i);
         __ mov(r2, Operand(value_low));