CMake tweak for old boost

CMakeLists.txt

 	)  
 	if(Boost_FOUND)
   		include_directories(${Boost_INCLUDE_DIRS})
-	endif()
-	find_path( HAVE_BOOST_SPECIAL_FUNCTIONS "boost/math/special_functions.hpp" ) 
-	if(HAVE_BOOST_SPECIAL_FUNCTIONS)
-		add_definitions(-DHAVE_BOOST_SPECIAL_FUNCTIONS)
+		find_path( HAVE_BOOST_SPECIAL_FUNCTIONS "boost/math/special_functions.hpp" ) 
+		if(HAVE_BOOST_SPECIAL_FUNCTIONS)
+			add_definitions(-DHAVE_BOOST_SPECIAL_FUNCTIONS)
+		endif()
 	endif()
 	find_path( HAVE_BOOST_PROGRESS "boost/progress.hpp" ) 
-	if(HAVE_BOOST_PROGRESS)
+		if(HAVE_BOOST_PROGRESS)
 		add_definitions(-DHAVE_BOOST_PROGRESS)
 	endif()
 endif()