修复结算页发票点选后，发票抬头与类型不能点选的bug

Code Review By Rock Zhang

@@ -242,10 +242,10 @@ $('.coin').on('touchend', function() {
     orderCompute();
 });
 
-$invoice.on('touchend', function(e) {
+$invoice.on('touchend', '.checkbox', function(e) {
     var $this = $(this);
 
-    orderInfo('invoice', $this.find('.checkbox').hasClass('icon-cb-checked'));
+    orderInfo('invoice', $this.hasClass('icon-cb-checked'));
     e.preventDefault();
     e.stopPropagation();
 });