updated to 7.4.169

7.4.162  running tests in shadow dir doesn't work
7.4.163  (after 7.4.142) MS-Windows 7 input doesn't work properly
7.4.164  problem with event handling on Windows 8
7.4.165  by default, after closing a buffer changes can't be undone
7.4.166  auto-loading a function for code that won't be executed
7.4.167  (after 7.4.149) fixes are not tested
7.4.168  can't compile with Ruby 2.1.0
7.4.169  ":sleep" puts cursor in the wrong column