patch 8.1.0933: When using VTP scroll region isn't used properly

Problem:    When using VTP scroll region isn't used properly.
Solution:   Make better use of the scroll region. (Nobuhiro Takasaki,
            closes #3974)
diff --git a/src/version.c b/src/version.c
index aa73ebd..21b9217 100644
--- a/src/version.c
+++ b/src/version.c
@@ -780,6 +780,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    933,
+/**/
     932,
 /**/
     931,