patch 9.0.1608: update_topline() is called twice

Problem:    update_topline() is called twice.
Solution:   Do not call update_topline() before curs_columns(). (Luuk van
            Baal, closes #12495)
diff --git a/src/version.c b/src/version.c
index 13a537d..1a8dd0e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1608,
+/**/
     1607,
 /**/
     1606,