Bug#1030208: Acknowledgement (statsmodels: FTBFS with scipy 1.10 on 32-bit: int64 -> int32 cast)

[Rebecca N. Palmer]

Control: merge -1 1030210 1030221

Not obviously known upstream.

It's due to the test passing an int64 array to np.bincount (which casts 
to native-size int).  Hence, we can probably get it to pass by 
explicitly casting to int32 in the test code, but I haven't tried that yet.

I don't know exactly what caused this array to be int64 instead of int32.