mutt: Fix pager mini-index drawing when $pager_index_lines = 1 a...

[Brendan Cully]

changeset: 6639:e1cec1a958e9
user:      Kevin McCarthy <ke...@8t8.us>
date:      Sat Apr 30 13:05:43 2016 -0700
link:      http://dev.mutt.org/hg/mutt/rev/e1cec1a958e9

Fix pager mini-index drawing when $pager_index_lines = 1 and $status_on_top.

When $pager_index_lines is 1, there is room for the index status line,
but not for any actual index entries.  The index redraw part was
always calling menu_redraw_current() which doesn't actually check if
there is room for the current row.

This bug only shows up with $status_on_top, due to the order things
are redrawn.

diffs (13 lines):

diff -r d0746905cb3f -r e1cec1a958e9 pager.c
--- a/pager.c   Sat Apr 30 10:50:43 2016 -0700
+++ b/pager.c   Sat Apr 30 13:05:43 2016 -0700
@@ -1854,7 +1854,8 @@
     {
       /* redraw the pager_index indicator, because the
        * flags for this message might have changed. */
-      menu_redraw_current (index);
+      if (index_window->rows > 0)
+        menu_redraw_current (index);
 
       /* print out the index status bar */
       menu_status_line (buffer, sizeof (buffer), index, NONULL(Status));