numpy/numpy — pull request #305 by r0k3 (2012-06-11 14:26:57+00:00)
Title: Fix for the error while pickling MaskedConstant.

Pickling an object that contains a MaskedConstant fails with:
AttributeError: 'MaskedConstant' object has no attribute '_fill_value' .
This is due to an unsupported signature of MaskedConstant.__new__ that subclasses MaskedArray. The __reduce__ method has to be adapted for the new signature.