From: John Keeping <john@keeping.me.uk>
Date: Mon, 8 Feb 2016 14:12:35 +0000 (+0000)
Subject: ui-stats: cast pointer before checking for zero
X-Git-Url: https://gitweb.ps.run/ps-cgit/commitdiff_plain/bdcbe0922d7099ebd61d875709ea9408bc1d7543?hp=bdcbe0922d7099ebd61d875709ea9408bc1d7543

ui-stats: cast pointer before checking for zero

We abuse the "void *util" field as a counter and recently started to
cast it to a uintptr_t to avoid risking nasal demons by performing
arithmetic on a void pointer.

However, compilers are also known to do "interesting" things if they
know that a pointer is or isn't NULL.  Make this safer by checking if
the counter (after casting) is non-zero rather than checking if the
pointer is non-null.

Signed-off-by: John Keeping <john@keeping.me.uk>
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