also fix a crash when m is null, this can only happen when selmon is NULL
YJWSTQFOMSZ32UBROP5JT5E2KS7Q22TR675RWQYNX54RZTKTSE7QC
24ZMBWYLMODPBAVLT4XNOSETHQXVLXNASYXUIGG2435IT7WIZC5AC
7B74AT3BXYB7PVW4F6SGQNPMHOU5TEV5TZ54CG6VSQI46XSEKWXQC
6NXBAN3QZAR65EWJ3T6WZK5SJGNSSIHRPGN7O42OMYN22GJKNCKQC
7L3TU7JVWPBPHN7WF4TJ263BZ6BC3AYRRW6PULFUP5JZUGWWNUSAC
FJIYVCRICFJ7T52B2SLJOGFFX6AEYZNOSM3FJZ2B2ETFFYX2QXNAC
wlr_scene_node_set_enabled(c->scene, VISIBLEON(c, c->mon));
if (c->mon == m) wlr_scene_node_set_enabled(c->scene, VISIBLEON(c, m));
if (c->mon == m)
wlr_scene_node_set_enabled(c->scene, VISIBLEON(c, m));
if (m->lt[m->sellt]->arrange)
if (m && m->lt[m->sellt]->arrange)