patch 8.1.1398: duplicate line in MSVC build file

Problem:    Duplicate line in MSVC build file.
Solution:   Remove the line. (Ken Takata, closes #4436)
diff --git a/src/version.c b/src/version.c
index 0e7f14d..8cfb965 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1398,
+/**/
     1397,
 /**/
     1396,