[glibmm] Add missing GLIBMM_VFUNCS_ENABLED to avoid breaking existing code.

[Murray Cumming <murrayc src gnome org>]

commit 3206af4e30986ce89eef7467daa300759485e78b
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Jun 1 16:44:05 2010 +0200

    Add missing GLIBMM_VFUNCS_ENABLED to avoid breaking existing code.
    
    * glib/glibmmconfig.h.in: Added missing GLIBMM_VFUNCS_ENABLED.

 glib/glibmmconfig.h.in |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/glib/glibmmconfig.h.in b/glib/glibmmconfig.h.in
index c66e12c..65304cc 100644
--- a/glib/glibmmconfig.h.in
+++ b/glib/glibmmconfig.h.in
@@ -47,6 +47,9 @@
 /* This is always set. This is only for backwards compatibility. */
 #undef GLIBMM_EXCEPTIONS_ENABLED
 
+/* This is always set. This is only for backwards compatibility. */
+#undef GLIBMM_VFUNCS_ENABLED
+
 /* Defined if a static member variable may be initialized inline to
    std::string::npos */
 #undef GLIBMM_HAVE_ALLOWS_STATIC_INLINE_NPOS
@@ -123,7 +126,7 @@
 #ifdef GLIBMM_DLL
 # if defined(GLIBMM_BUILD) && defined(_WINDLL)
    /* Do not dllexport as it is handled by gendef on MSVC */
-#  define GLIBMM_API 
+#  define GLIBMM_API
 # elif !defined(GLIBMM_BUILD)
 #  define GLIBMM_API __declspec(dllimport)
 # else