Forgot to add the dead key define so that the source code can actually use it.

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4370 3789f03b-4d11-0410-bbf8-ca57d06f2519

config.h.cmake.in

@@ -11,6 +11,7 @@
 #cmakedefine HAVE_GNUTLS_DATUM_T
 #cmakedefine HAVE_GNUTLS_PK_ALGORITHM_T
 #cmakedefine HAVE_GNUTLS_SIGN_ALGORITHM_T
+#cmakedefine HAVE_FLTK_DEAD_KEYS
 
 /* MS Visual Studio 2008 and newer doesn't know ssize_t */
 #if defined(HAVE_GNUTLS) && defined(WIN32) && !defined(__MINGW32__)