[ghc] only require ghc-doc-index if we package it

[Jens Petersen]

commit 67bcee1c1cd1f7fb766c532b95419bbb4f569336
Author: Jens Petersen <petersen at redhat.com>
Date:   Tue Apr 23 19:52:22 2013 +0900

    only require ghc-doc-index if we package it

 ghc.spec |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/ghc.spec b/ghc.spec
index ec3af0c..e5ab498 100644
--- a/ghc.spec
+++ b/ghc.spec
@@ -84,7 +84,9 @@ BuildRequires: python
 BuildRequires: llvm >= 3.0
 %endif
 Requires: ghc-compiler = %{version}-%{release}
+%if %{undefined without_haddock}
 Requires: ghc-doc-index = %{version}-%{release}
+%endif
 Requires: ghc-libraries = %{version}-%{release}
 Requires: ghc-ghc-devel = %{version}-%{release}