1.56.1

Small hot-fix release. See release notes for 1.56.

- Automatic input rate now only works for close multiples   (BearOso)
  of 60Hz.
- Win32: Cheats are now shown in the correct order in the   (BearOso)
  list view.
- GTK+: Check for version greater than 3.22 when using GTK+ (BearOso)
  3.
- GTK+: Don't resize code and description field in GTK+ 2.  (BearOso)