security/doscan: Fix build with Clang 6
src/event_queue.cc:161:43: error: invalid operands to binary expression
('basic_ostream<char, std::__1::char_traits<char> >' and 'std::__1::ostream'
(aka 'basic_ostream<char>'))
std::cerr << "No handlers installed." << std::cerr;
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~http://beefy11.nyi.freebsd.org/data/head-i386-default/p477696_s338122/logs/errors/doscan-0.3.3_1.log
- Make sure the build respects CXXFLAGS