removed dead code
not necessary to initialize 'label_element' to 'undefined'.
use === to compare with 0.
added missing ;
use !== to compare with undefined.
added global declaration of $wpsc_shipping_modules
removed dead assignments
Updated PHPDoc
updated PHPDoc
Merge remote-tracking branch 'upstream/master' into pr-issue-1119-checkout-page-issues

Conflicts:
	wpsc-core/js/wp-e-commerce.js
updated location visibility function after merge
Updated PHPDoc for scrutinizer
Merge branch 'pr-issue-1119-checkout-page-issues' into pr-issue-1174-user-log-form

Conflicts:
	wpsc-core/js/wp-e-commerce.js
updated PHPDoc trying to sooth scrutinizer
PHPDoc updates
PHPDoc updates
PHPDoc updates
Merge branch 'pr-issue-1119-checkout-page-issues' into pr-issue-1174-user-log-form