[arpack] Fix typo

[Orion Poplawski]

commit 07c90860a5c36aaa79b662e4090955aa739c08c5
Author: Orion Poplawski <orion at cora.nwra.com>
Date:   Sat Sep 21 22:14:59 2013 -0600

    Fix typo

 arpack.spec |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/arpack.spec b/arpack.spec
index ac70b8b..0304a0e 100644
--- a/arpack.spec
+++ b/arpack.spec
@@ -61,7 +61,7 @@ library and so links used for building arpack based applications.
 
 %build
 export F77=gfortran
-% 0%{?fedora} >= 21
+%if 0%{?fedora} >= 21
 %global atlaslib -L%{_libdir}/atlas -ltatlas
 %else
 %global atlaslib -L%{_libdir}/atlas -lf77blas -latlas