Fix some minor cohesion issues in changes to wpec_taxes_get_region_code_by_id()
 is unused in _wpsc_country_default_properties().
Remove unnecessary extra parameter from filter.
Remove unused  variable.
remove unused  var.
Remove additional unused variable.
Use idiomatic variables for sales and normal price.
Merge remote-tracking branch 'upstream/master' into pr-issue-1087-localization-geo-and-ajax-updates