Hack that solves Solr stats calculation crap-out.

Alright, you will now have results with this patch.  It's a hack, I admin, but it works.  What I've gathered is that, thanks to Java, number types can be very touchy.  And when the stats are calculated on a query, the decimal type that fts_field_listing_list_price is indexed as is breaking the stats calculations that Solr does on each query.