Add support for multimedia keys.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4437 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f38a017..5ef2ee2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -191,6 +191,9 @@
   # FLTK STR #2636
   check_cxx_source_compiles("#include <FL/Fl.H>\nint main(int c, char** v) { Fl::add_clipboard_notify(NULL, NULL); return 0; }" HAVE_FLTK_CLIPBOARD)
 
+  # FLTK STR #2638
+  check_cxx_source_compiles("#include <FL/Enumerations.H>\nint main(int c, char** v) { return FL_Volume_Down; }" HAVE_FLTK_MEDIAKEYS)
+
   set(CMAKE_REQUIRED_INCLUDES)
   set(CMAKE_REQUIRED_LIBRARIES)
 endif()