patch 8.2.0669: MS-Windows: display in VTP is a bit slow

Problem:    MS-Windows: display in VTP is a bit slow.
Solution:   Optimize the code. (Nobuhiro Takasaki, closes #6014)
diff --git a/src/version.c b/src/version.c
index 7382a3d..6b3a159 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    669,
+/**/
     668,
 /**/
     667,