update oqs and addorder qty 0

app/assets/javascripts/addorder.js

@@ -1001,8 +1001,13 @@ $(function() {
   });
   //click save buttom after change qty
   $('#sx_itemModal').on('click','#save', function(){  
-    summary_items_filter(); 
-    calculate_sub_total();
+    if ($('#modal-qty').val()>0) {
+      summary_items_filter(); 
+      calculate_sub_total();
+    }else{
+      swal("Opps", "Please enter number for qty ","warning");
+    }
+    
   });
 
   //calculate subtotal