ledger-3.1.1-boost-1.61-compat.diff

diff -aur ledger-3.1.1.pristine/src/item.h ledger-3.1.1.new/src/item.h
--- ledger-3.1.1.pristine/src/item.h    2016-09-15 13:36:27.891118962 +0200
+++ ledger-3.1.1.new/src/item.h 2016-09-15 13:38:24.963571037 +0200
@@ -92,7 +92,7 @@

   typedef std::pair<optional<value_t>, bool> tag_data_t;
   typedef std::map<string, tag_data_t,
-                   function<bool(string, string)> > string_map;
+           std::function<bool(string, string)> > string_map;

   state_t              _state;
   optional<date_t>     _date;