+ Fixed multiple giftcards issue per Bug #4 reported on Sourceforge where a
second giftcard added would have its balance set to $0 even if the sale did
not require the total of the second giftcard to pay the remaining amount due.
+ Small code cleanup
git-svn-id: svn+ssh://jekkos@svn.code.sf.net/p/opensourcepos/code/@58 c3eb156b-1dc0-44e1-88ae-e38439141b53