patch 9.1.0102: settabvar() may change the last accessed tabpage

Problem:  settabvar() may change the last accessed tabpage.
Solution: Save and restore lastused_tabpage.
          (zeertzjq)

closes: #14017

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index fec8252..e20b427 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    102,
+/**/
     101,
 /**/
     100,