void
c_delete(char *c, char **argv) {
	Row *line = b_getline(buffer, atoi(c + 2));
	Row *prev_line = b_getline(buffer, atoi(c + 2) - 1);
	if (line == NULL || prev_line == NULL) {puts ("invalid line"); return; }

	prev_line->n = line->n;
	line->n->p = prev_line;
	free(line);
}