Replace volatile with configLIST_VOLATILE (#1027)

include/list.h

diff --git a/include/list.h b/include/list.h
index 091553d..0de51bb 100644
--- a/include/list.h
+++ b/include/list.h
@@ -172,7 +172,7 @@
 typedef struct xLIST
 {
     listFIRST_LIST_INTEGRITY_CHECK_VALUE      /**< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */
-    volatile UBaseType_t uxNumberOfItems;
+    configLIST_VOLATILE UBaseType_t uxNumberOfItems;
     ListItem_t * configLIST_VOLATILE pxIndex; /**< Used to walk through the list.  Points to the last item returned by a call to listGET_OWNER_OF_NEXT_ENTRY (). */
     MiniListItem_t xListEnd;                  /**< List item that contains the maximum possible item value meaning it is always at the end of the list and is therefore used as a marker. */
     listSECOND_LIST_INTEGRITY_CHECK_VALUE     /**< Set to a known value if configUSE_LIST_DATA_INTEGRITY_CHECK_BYTES is set to 1. */