Count handler can expose unititialized values when used with the flatten filter and empty geometries

[Dewey Dunnington]

wk::wk_flatten(wk::wkt("MULTILINESTRING EMPTY"))
#> <wk_wkt[0]>
wk::wk_handle(wk::wkt("MULTILINESTRING EMPTY"), wk::wk_flatten_filter(wk::wk_count_handler()))
#> $n_geom
#> [1] 329216
#> 
#> $n_ring
#> [1] 0
#> 
#> $n_coord
#> [1] 0

^{Created on 2022-01-24 by the reprex package (v2.0.1)}

[Dewey Dunnington]

Even more minimal reprex:

wk::wk_count(wk::wkt())
#>      n_geom    n_ring n_coord
#> 1 933369368 931197112       0

^{Created on 2022-09-19 by the reprex package (v2.0.1)}