vtm.c:1379:24: warning: '&&' within '||' [-Wlogical-op-parentheses]
        for (c = sel->next; c && !isvisible(c) || c->minimized; c = c->next);
                            ~~^~~~~~~~~~~~~~~~ ~~
vtm.c:1379:24: note: place parentheses around the '&&' expression to silence this warning
        for (c = sel->next; c && !isvisible(c) || c->minimized; c = c->next);
                              ^
                            (                 )