charts: Allow passing a null pointer to chart_unref.
authorBen Pfaff <blp@gnu.org>
Mon, 20 Jul 2009 00:11:46 +0000 (17:11 -0700)
committerBen Pfaff <blp@gnu.org>
Mon, 20 Jul 2009 00:11:53 +0000 (17:11 -0700)
commit5278a229f3fce7a8d1f2d8f6b576d1c8b76f3779
treeda51bfb5260636e94dd505d33632323edfbcbbd0
parent765214287d1b2cb5d1857051b6c54cd5b7fce4b5
charts: Allow passing a null pointer to chart_unref.
src/output/chart.c