grid_get_cell1
grid_get_cell1(&gd->linedata[line], 0, &gc);
grid_get_cell1(from, want, &gc);
grid_get_cell1(gl, i, &gc);
grid_get_cell1(gl, i, &gc);
grid_get_cell1(gl, i, &gc);
grid_get_cell1(&gd->linedata[py], px, gc);