[sdformat/el6] Only require doxygen for documentation

[rmattes]

commit de30e85693bfaaf58f70c08067ec64e1ab1a1b31
Author: Rich Mattes <richmattes at gmail.com>
Date:   Thu Nov 21 22:59:24 2013 -0500

    Only require doxygen for documentation

 sdformat.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/sdformat.spec b/sdformat.spec
index 5350652..294761b 100644
--- a/sdformat.spec
+++ b/sdformat.spec
@@ -17,7 +17,7 @@ Patch0:		sdformat-1.4.10-urdfdom.patch
 Patch1:		sdformat-1.4.10-gtest.patch
 BuildRequires:	boost-devel
 BuildRequires:	cmake28
-BuildRequires:	doxygen-latex
+BuildRequires:	doxygen
 BuildRequires:	graphviz
 BuildRequires:	gtest-devel
 BuildRequires:	texlive-refman