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qlist: Make conversion from QObject * accept null

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qobject_to_qlist() crashes on null, which is a trap for the unwary.
Return null instead.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1444918537-18107-6-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Markus Armbruster 2015-10-15 16:15:36 +02:00
parent fcf73f66a6
commit 2d6421a900
1 changed files with 1 additions and 2 deletions
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3
qobject/qlist.c
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@ -142,10 +142,9 @@ size_t qlist_size(const QList *qlist)
*/
QList *qobject_to_qlist(const QObject *obj)
{
if (qobject_type(obj) != QTYPE_QLIST) {
if (!obj || qobject_type(obj) != QTYPE_QLIST) {
return NULL;
}
return container_of(obj, QList, base);
}