updated to 7.4.161

updated to 7.4.161

7.4.136  (after 7.4.096) Windows: readonly when saving UNC path file
7.4.137  cannot use IME with Windows 8 console
7.4.138  (after 7.4.114) directory change messages are not recognized
7.4.139  crash when using :cd in autocommand
7.4.140  crash when autocommand wipes out only other buffer
7.4.141  problems when building with Borland
7.4.142  (after 7.4.137) on MS-Windows 8 IME input doen't work well
7.4.143  TextChangedI is not triggered.
7.4.144  MingW also supports intptr_t for OPEN_OH_ARGTYPE
7.4.145  getregtype() does not return zero for unknown register
7.4.146  when starting Vim with "-u NONE" v:oldfiles is NULL
7.4.147  cursor position wrong when using "gj" after "$"
7.4.148  cannot build with Cygwin and X1.
7.4.149  get E685 error when assigning a function to autoload variable
7.4.150  :keeppatterns is not respected for :s
7.4.151  Python: slices with steps are not supported
7.4.152  Python: Cannot iterate over options
7.4.153  compiler warning for pointer type
7.4.154  (after 7.4.149) still a problem with auto-loading
7.4.155  (after 7.4.150) search offset not kept with :keeppatterns
7.4.156  test file missing from distribution
7.4.157  error number used twice
7.4.158  pattern containing \zs not handled correctly by substitute()
7.4.159  completion hangs when using the current buffer after keywords
7.4.160  Win32: Crash when executing external command
7.4.161  crash in Python exception handling