Fix possible null pointer dereference (#649)
Fix possible null pointer dereference (#649)

Either crtc_info == NULL is redundant or there is a possible null pointer
dereference.

Closes https://github.com/lxqt/lxqt/issues/1831.
lxde/lxqt-config,stefonarch/lxqt-config,lxde/lxqt-config,stefonarch/lxqt-config,stefonarch/lxqt-config,lxde/lxqt-config,lxde/lxqt-config