library location in Fedora depends on architecture (lib/lib64)

diff -uNPrp fatrat-opensubtitles-1.1.2.old/CMakeLists.txt fatrat-opensubtitles-1.1.2.new/CMakeLists.txt
--- fatrat-opensubtitles-1.1.2.old/CMakeLists.txt	2010-02-12 12:49:53.000000000 +0100
+++ fatrat-opensubtitles-1.1.2.new/CMakeLists.txt	2010-09-08 14:40:44.574647555 +0200
@@ -72,7 +72,7 @@ if(WITH_NLS)
 	install(FILES ${lrelease_outputs} DESTINATION share/fatrat/lang)
 endif(WITH_NLS)
 
-install(TARGETS fatrat-opensubtitles DESTINATION lib/fatrat/plugins)
+install(TARGETS fatrat-opensubtitles DESTINATION ${CMAKE_INSTALL_LIBDIR}/fatrat/plugins)
 
 install(FILES
 	DESTINATION share/fatrat/data/plugins/fatrat-opensubtitles