Comment 4 for bug 905589

Thank you very much for the fix! I thought it was working good, until
I found sometimes sml-modeline-vis-face disappears. In my Emacs, I can
reproduce this by doing the following:

1. open a buffer which has 3000 lines, in a window which has 42 lines
2. go to the x-th line (2720 < x < 2978)
3. hit C-l

I noticed that line 2977 is the largest line number that you don't see
the last line in the buffer.