shell: check type of window/sidebar object in ev_sidebar_thumbnails_is_two_columns function (!244) · Merge requests · GNOME / evince

ilario requested to merge ilario/evince:check_evwindow into master May 29, 2020

See discussion on #1409 (closed), this is my attempt to fix it. Please review carefully as I am not proficient in C programming nor in Evince design.

shell: check type of window/sidebar object in ev_sidebar_thumbnails_is_two_columns function