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)

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1608,
 /**/
     1607,
 /**/