[ghc] test ghc_packages_list in requires for mock

[Jens Petersen]

commit 199162c70af718280b8e89642457e1a969823149
Author: Jens Petersen <petersen at redhat.com>
Date:   Wed Jan 5 21:48:11 2011 +0900

    test ghc_packages_list in requires for mock

 ghc.spec |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/ghc.spec b/ghc.spec
index ec4470e..09d7976 100644
--- a/ghc.spec
+++ b/ghc.spec
@@ -107,7 +107,7 @@ interface.
 %package devel
 Summary: GHC development libraries meta package
 Group: Development/Libraries
-Requires: %(echo %{ghc_packages_list} | sed -e "s/\([^ ]*\)-\([^ ]*\)/ghc-\1-devel = \2,/g")
+%{?ghc_packages_list:Requires: %(echo %{ghc_packages_list} | sed -e "s/\([^ ]*\)-\([^ ]*\)/ghc-\1-devel = \2,/g")}
 
 %description devel
 This is a meta-package for all the development library packages in GHC.
@@ -116,7 +116,7 @@ This is a meta-package for all the development library packages in GHC.
 %package prof
 Summary: GHC profiling libraries meta-package
 Group: Development/Libraries
-Requires: %(echo %{ghc_packages_list} | sed -e "s/\([^ ]*\)-\([^ ]*\)/ghc-\1-prof = \2,/g")
+%{?ghc_packages_list:Requires: %(echo %{ghc_packages_list} | sed -e "s/\([^ ]*\)-\([^ ]*\)/ghc-\1-prof = \2,/g")}
 Obsoletes: ghc-haddock-prof < 2.4.2-3
 
 %description prof