even if downloader->priv->urisrc is not set. This avoids deadlock under some some conditions on cancel. https://bugzilla.gnome.org/show_bug.cgi?id=723127
even if downloader->priv->urisrc is not set. This avoids deadlock under some some conditions on cancel. https://bugzilla.gnome.org/show_bug.cgi?id=723127