patch 9.0.1650: MS-Windows: default 'viewdir' may include read-only directory

Problem:    MS-Windows: default 'viewdir' may include read-only directory.
Solution:   Use $HOME instead of $VIM for 'viewdir' default. (closes #12119)
diff --git a/src/version.c b/src/version.c
index 5535b9a..85f4db1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1650,
+/**/
     1649,
 /**/
     1648,