When we write extended attributes, assert that the inode hasn't already been deleted.  The assertion is important to show that we won't end up accounting for extended attribute blocks (using fs_pendingblocks) in our subsequent call to fs_alloc().
When we write extended attributes, assert that the inode hasn't
already been deleted.  The assertion is important to show that
we won't end up accounting for extended attribute blocks (using
fs_pendingblocks) in our subsequent call to fs_alloc().

Agreed verbally by: mckusick

MFC after:	3 weeks

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