cmake build system: minor cleanup

Signed-off-by: Tim Blechmann <tim@klingt.org>
(cherry picked from commit 7743af1)

Signed-off-by: Dan Stowell <danstowell@users.sourceforge.net>

lang/CMakeLists.txt

@@ -276,7 +276,7 @@ endif()
 
 add_executable(sclang LangSource/cmdLineFuncs.cpp)
 
-if (${Boost_FOUND})
+if (Boost_FOUND)
 	target_link_libraries(sclang libsclang ${Boost_THREAD_LIBRARY})
 else()
 	target_link_libraries(sclang libsclang boost_thread)