Asset count is misreported in the asset model list when attachments are present

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Add some attachments to an asset model.
2. Create at least one asset of that asset model. 

What is the expected output? What do you see instead?
In the asset model list, note that the number in parentheses for that asset 
model is not an accurate count of the assets. Instead it is the number of 
assets multiplied by the number of attachments the asset model has.

Please use labels and text to provide additional information.

Original issue reported on code.google.com by jsincl...@tracmor.com on 11 Jan 2012 at 8:04