Fix query bug when fetching filtered entity lists

[justinian]

In librg_world_fetch_chunkarray and librg_world_fetch_ownerarray, only the first buffer_limit of the world's entities were ever being checked, even if no matching entities had yet been added to the list. This meant that even if you know there are a small number of entites owned by a given owner, you have to pass a big enough array to hold the whole world to be sure to find them.

[inlife]

Good catch. Since we then returned a suggested increase in the buffer size, all cases are covered.

Thanks for the fix! 🎉