message: [unittests] Fix warning
  warning: comparison of integers of different signs: 'const int' and
  'const unsigned long' [-Wsign-compare]
diff: @@ -115,7 +115,7 @@ CheckInvalidProgramTranslation(llvm::StringRef fpo_program,
  StreamBuffer<32> stream(Stream::eBinary, address_size, byte_order);
  EXPECT_FALSE(TranslateFPOProgramToDWARFExpression(
  fpo_program, target_register_name, arch_type, stream));
  - EXPECT_EQ(0, stream.GetSize());
  + EXPECT_EQ((size_t)0, stream.GetSize());
  }
  TEST(PDBFPOProgramToDWARFExpressionTests, InvalidAssignmentSingle) {
  