Add a missing null pointer check in wc_unescape, to bring it in line
authorsimon <simon@cda61777-01e9-0310-a592-d414129be87e>
Sun, 14 Jul 2013 10:46:17 +0000 (10:46 +0000)
committersimon <simon@cda61777-01e9-0310-a592-d414129be87e>
Sun, 14 Jul 2013 10:46:17 +0000 (10:46 +0000)
with the usage comment saying you're allowed to pass NULL to find out
only the return value. No caller actually does pass NULL at the
moment.

git-svn-id: svn://svn.tartarus.org/sgt/putty@9920 cda61777-01e9-0310-a592-d414129be87e


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