Marco Nelissen 0096b8d7d1 We should pass null for the album artist if it was not set, instead of a copy
of the artist, since the media provider needs to know whether the album artist
was actually set.

Change-Id: I29b885c8293609299a55babadf9ca2a30e20e5bd
2010-03-19 08:07:26 -07:00
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