gr_row_col
gr_row_col(&row, &col, (FLOOR | TUNNEL | OBJECT | STAIRS));
gr_row_col(&row, &col, (FLOOR | TUNNEL | STAIRS | OBJECT));
gr_row_col(&row, &col, (FLOOR | TUNNEL | STAIRS | OBJECT));
gr_row_col(&row, &col, (FLOOR | TUNNEL));
gr_row_col(&row, &col, (FLOOR | TUNNEL));
void gr_row_col(short *, short *, unsigned short);
gr_row_col(&row, &col, (FLOOR | MONSTER));
gr_row_col(&row, &col, (FLOOR | MONSTER));
gr_row_col(&row, &col, (FLOOR | TUNNEL | STAIRS | OBJECT));