Heuristic Selection in getNeighborsByHeuristic2

[mesibo]

We are testing HNSW and have a question about the parameter passed to the getNeighborsByHeuristic2(). Should the number of elements selected by the heuristic be Mcurmax instead of M_?

The current code on line 513 passes M_ as a parameter, but would it make more sense for this to be Mcurmax?

getNeighborsByHeuristic2(top_candidates, M_);

Any clarification or insight would be greatly appreciated.

Thanks