[libvisual] add BR: zlib-devel

[Tom Callaway]

commit 6f09ac4b91369c0fd9c9270a3124888ff460ffb9
Author: Tom Callaway <spot at fedoraproject.org>
Date:   Tue Dec 3 15:34:29 2013 -0500

    add BR: zlib-devel

 libvisual.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libvisual.spec b/libvisual.spec
index 30cacab..eb1b573 100644
--- a/libvisual.spec
+++ b/libvisual.spec
@@ -12,7 +12,7 @@ License:        LGPLv2+
 URL:            http://github.com/Libvisual/libvisual
 Source0:        https://github.com/Libvisual/libvisual/archive/%{commit}/%{name}-%{version}-%{shortcommit}.tar.gz
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
-BuildRequires:  xorg-x11-proto-devel, orc-devel, cmake
+BuildRequires:  xorg-x11-proto-devel, orc-devel, cmake, zlib-devel
 
 # https://bugzilla.redhat.com/show_bug.cgi?id=435771
 Patch0:         libvisual-0.5.0-better-altivec-detection.patch