fix typo in FindTaucs.cmake

cmake/FindTaucs.cmake

diff --git a/cmake/FindTaucs.cmake b/cmake/FindTaucs.cmake
index ace3220..f1615b8 100644
--- a/cmake/FindTaucs.cmake
+++ b/cmake/FindTaucs.cmake
@@ -18,7 +18,7 @@
   find_library(TAUCS_LIBRARIES taucs PATHS $ENV{TAUCSDIR} ${LIB_INSTALL_DIR})
 
   if(TAUCS_LIBRARIES)
-    set(TAUCS_LIBRARIES ${TAUCS_LIBRARIES} ${LAPACK_LIBRARY})
+    set(TAUCS_LIBRARIES ${TAUCS_LIBRARIES} ${LAPACK_LIBRARIES})
   endif(TAUCS_LIBRARIES)
 
 endif(LAPACK_FOUND)