[libass] Fix a typo.

[Martin Sourada]

commit 853923bfbb01929ad6372753c8fdc42b6f7b4ba2
Author: Martin Sourada <mso at fedoraproject.org>
Date:   Wed Oct 17 10:43:01 2012 +0200

    Fix a typo.

 libass.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libass.spec b/libass.spec
index d87380a..747da6a 100644
--- a/libass.spec
+++ b/libass.spec
@@ -18,7 +18,7 @@ BuildRequires:  fribidi-devel
 # The oldest required version harfbuzz-ng 0.7.0, fedora 17 and bellow have
 # harfbuff 0.6.x.
 # For advanced opentype shaping.
-BuildRequires:  hrafbuzz-devel >= 0.7.0
+BuildRequires:  harfbuzz-devel >= 0.7.0
 %endif