updated to use new wp calls

git-svn-id: https://plugins.svn.wordpress.org/wp-easycart/trunk@987424 b8457f37-d9ea-0310-8a92-e5e31aec5664
check addition to 'define' variable

git-svn-id: https://plugins.svn.wordpress.org/wp-easycart/trunk@987426 b8457f37-d9ea-0310-8a92-e5e31aec5664