numpy/numpy — pull request #4045 by abalkin (2013-11-12 18:12:32+00:00)
Title: ENH: ma.asarray() and ma.asanyarray() will pass through input of the cor...

...rect type.

If x is of type MaskedArray for ma.asarray(x) or any subtype of
MaskedArray for ma.asanyarray(x), these functions will simply return x.
This makes them consistent with their numpy counterparts.

Closes gh-4043.