makeNdArray: return pyarray directly instead of bp::incref

[clemisch]

Backend helper makeNdArray unnecessarily uses bp::incref on returned array. This increases its refcount from 1 to 2 and effectively leads to a memory leak. PyArray_SimpleNew() already returns a new reference with refcount 1 so the incref is unnecessary.

[clemisch]

PS: I know this number of incoming contributions might look a bit... suspicious these days. I have been using them for months in my forks; it's just that I finally contribute them upstream now all at once ;-)

E.g. this one is here: clemisch@0786ab5

[vincefn]

Can you add the corresponding news item ?

[clemisch]

done