a7a376ae1f
Some of the mutter code using these properties expects them to be null-terminated whereas xcb does not use null-terminated strings: http://xcb.freedesktop.org/XcbRationale/ This was in some cases resulting in the WM_CLASS property containing garbage data which broke application matching, caused the hot-corner and window-switcher to stop working, or was exposed as text in the UI. https://bugzilla.gnome.org/show_bug.cgi?id=759658