not passing 2 params to wpsc_the_category_title with the_title filter

Gary was just a bit to fast tonight. I meant to put this in with my other commits fixing wpsc_the_category_title but he merged them before I could get to adding it.

With the code committed earlier we will see a debug notice in WPEC core on the Add Product/Product list admin pages. `the_title` filter passed 2 params so this kills passing the second one thus killing the debug notice.