[micro] Added "#include <functional>"

zamazan4ik · web-flow · commit 1a34a6935b76 · 2016-07-11T18:26:18.000+03:00
diff --git a/include/boost/algorithm/is_palindrome.hpp b/include/boost/algorithm/is_palindrome.hpp
@@ -16,6 +16,7 @@
 #define BOOST_ALGORITHM_IS_PALINDROME_HPP
 
 #include <iterator>
+#include <functional>
 
 #include <boost/range/begin.hpp>
 #include <boost/range/end.hpp>
