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Fix segfault drawing pie charts with old versions of libplot.
author
Ben Pfaff
<blp@gnu.org>
Fri, 3 Jul 2009 18:34:26 +0000
(11:34 -0700)
committer
Ben Pfaff
<blp@gnu.org>
Fri, 3 Jul 2009 18:34:26 +0000
(11:34 -0700)
If chart_create returned null, we dereferenced a null pointer just below.
Avoid doing this.
Also add similar fixes to other code that calls chart_create. It may not
be necessary in every case.
Reported by Jason Stover.
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