checkpatch: update to version 0.23

This update brings a few small fixes to existing checks.  Of note:

 - restricts case/default checks to changed lines,
 - suppresses perl errors for short patch hunks
 - fixes comment handling for long hunks

Complete changelog below.

-apw

Andy Whitcroft (7):
  checkpatch: case/default checks should only check changed lines
  checkpatch: suppress errors triggered by short patch
  checkpatch: handle comment/quote nesting correctly
  checkpatch: check line endings in text format files
  checkpatch: suspect indent count condition lines correctly
  checkpatch: ensure we only apply checks to the lines within hunks
  checkpatch: version: 0.23

 scripts/checkpatch.pl |   37 +++++++++++++++++++++----------------
 1 files changed, 21 insertions(+), 16 deletions(-)