Fixes error for tuplet bracket direction calculation when tuplets contain rests. (issue4668045)

[mtsolo]

Reviewers: ,

Message:
Cheers,
MS

Description:
Fixes error for tuplet bracket direction calculation when tuplets
contain rests.

Please review this at http://codereview.appspot.com/4668045/

Affected files:
  M lily/tuplet-bracket.cc


Index: lily/tuplet-bracket.cc
diff --git a/lily/tuplet-bracket.cc b/lily/tuplet-bracket.cc
index  
3bf2d1b49e8487815b79d1ec8af0b89a526803b2..f09a3a8e093eebb3f7435abbe99a859c561689cc  
100644
--- a/lily/tuplet-bracket.cc
+++ b/lily/tuplet-bracket.cc
@@ -730,6 +730,8 @@ Tuplet_bracket::get_default_dir (Grob *me)
   for (vsize i = 0; i < columns.size (); i++)
     {
       Grob *nc = columns[i];
+      if (Note_column::has_rests (nc))
+        continue;
       Direction d = Note_column::dir (nc);
       if (d)
        dirs[d]++;