patch 8.1.0323: reverse order of VTP calls only needed the first time

Problem:    Reverse order of VTP calls only needed the first time.
Solution:   Add a flag to remember the state. (Nobuhiro Takasaki, closes #3366)
diff --git a/src/version.c b/src/version.c
index 919d790..01854c8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    323,
+/**/
     322,
 /**/
     321,