indentation issue

CMakeLists.txt

@@ -557,7 +557,7 @@ if ( enable-libsndfile )
         else (SndFile_WITH_EXTERNAL_LIBS)
             message ( NOTICE "Seems like libsndfile was compiled without OGG/Vorbis support." )
         endif (SndFile_WITH_EXTERNAL_LIBS)
-	else ( LIBSNDFILE_SUPPORT )
+    else ( LIBSNDFILE_SUPPORT )
         message( STATUS "Could NOT find SndFile (Set SndFile_DIR to the directory containing its CMake config) (Required is at least version ${LIBSNDFILE_MINIMUM_VERSION})" )
     endif ( LIBSNDFILE_SUPPORT )
     #set(CMAKE_FIND_DEBUG_MODE OFF)