Slightly simplifies the callers since they don't need to check for
non-NULL anymore.
I do extremely hate the workarounds here to suppress misprite taking the
cursor down though. Surely there's a better way.
[1.20: Do not in fact simplify the callers as above, since it would
change the ABI. - ajax]
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
(cherry picked from commit ff310903f3)
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