patch 7.4.1634

Problem:    Vertical movement after CTRL-A ends up in the wrong column.
            (Urtica Dioica)
Solution:   Set curswant when appropriate. (Hirohito Higashi)

src/ops.c

@@ -5783,6 +5783,8 @@ do_addsub(
 theend:
     if (visual)
 	curwin->w_cursor = save_cursor;
+    else if (did_change)
+	curwin->w_set_curswant = TRUE;
 
     return did_change;
 }