Segfaulting on ecs_octreen_findn

[retroswan]

Reproduction:
https://github.com/retroswan/flecs-physics-bug

Creating a system with this signature:

ECS_SYSTEM(world, CollisionsSystem, EcsPreUpdate, EcsPosition3, (EcsSpatialQuery, AABB), (EcsSpatialQueryResult, AABB));

With this code:

void CollisionsSystem(ecs_iter_t* it)
{
    EcsPosition3* p = ecs_term(it, EcsPosition3, 1);
    EcsSpatialQuery* q = ecs_term(it, EcsSpatialQuery, 2);
    EcsSpatialQueryResult* r = ecs_term(it, EcsSpatialQueryResult, 3);
    
    for(int i = 0; i < it->count; i++)
    {
        ecs_octree_findn(q[i].query, &p[i], 4, &r[i].results);
        for(int j = 0; j < r[i].results->count; j++)
        {
            //
        }
    }
}

Will result in a segfault when calling ecs_octree_findn.