Return early if original polygons don't require fixing

Nobody has claimed this yet.

In context of https://github.com/mapbox/mapbox-gl-native/issues/15268: if the original polygons are correct, there is no need to provide result that reorders original and return true.
Client then constructs another container, copying and casting all returned to domain specific type... e.g
https://github.com/mapbox/mapbox-gl-native/blob/273ad436fb4d2a18c6749bd4e40fa56546e9285c/src/mbgl/tile/geometry_tile_data.cpp#L51

In context of wagyu code, bookkeeping the dirty state would enable return statement after correct_topology:

```
template
bool execute(clip_type cliptype,
mapbox::geometry::multi_polygon& solution,
fill_type subject_fill_type,
fill_type clip_fill_type) {

if (minima_list.empty()) {
return false;
}

ring_manager manager;

build_hot_pixels(minima_list, manager);

execute_vatti(minima_list, manager, cliptype, subject_fill_type, clip_fill_type);

correct_topology(manager);

build_result(solution, manager, reverse_output);

return true;
}
```

Start at the execute function shown in the issue and inspect correct_topology, build_result, and the ring/minima bookkeeping around them. Compare the behavior with the linked geometry_tile_data.cpp caller. Done means already-correct original polygons can return without rebuilding or reordering the result, while cases requiring fixing still produce the existing result and return value.

Written by the indexing model from the issue text.