Index: branches/5.2.x/units/helpers/order_helper.php
===================================================================
diff -u -N -r14827 -r14831
--- branches/5.2.x/units/helpers/order_helper.php	(.../order_helper.php)	(revision 14827)
+++ branches/5.2.x/units/helpers/order_helper.php	(.../order_helper.php)	(revision 14831)
@@ -35,6 +35,8 @@
 			$items->Query();
 			$items->GoFirst();
 
+			$ret['order']['ItemsInCart'] = array_sum( $items->GetCol('Quantity') );
+
 			if ( $items->EOL() ) {
 				return $ret;
 			}