ncurses 5.9 - patch 20120707

ncurses 5.9 - patch 20120707

+ add ncurses_mingw.h to installed headers (prompted by patch by
  Juergen Pfeifer).
+ clarify return-codes from wgetch() in response to SIGWINCH (prompted
  by Novell #769788).
+ modify resizeterm() to always push a KEY_RESIZE onto the fifo, even
  if screensize is unchanged.  Modify _nc_update_screensize() to push a
  KEY_RESIZE if there was a SIGWINCH, even if it does not call
  resizeterm().  These changes eliminate the case where a SIGWINCH is
  received, but ERR returned from wgetch or wgetnstr because the screen
  dimensions did not change (Novell #769788).