col_t
col_remove(col_t *col)
col_t *col, *col_next;
col_t *col;
col_t *col;
static col_t *col_head;
static col_t *
col_t *col;
static col_t *
col_t *new_col;
new_col = malloc(sizeof (col_t));
(void) memset(new_col, 0, sizeof (col_t));