[glib] Update the comment in gmarshal.list

[Matthias Clasen <matthiasc src gnome org>]

commit 90f70099d86dbf6c249137f9fbaead1df8002f6e
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu May 31 23:48:35 2012 +0100

    Update the comment in gmarshal.list
    
    The current note makes it look like the marshaller code generation has
    been deprecated in favour of the libffi-based generic marshaller; this
    is not the case, so we should probably clarify the point a bit.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=677235

 gobject/gmarshal.list |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/gobject/gmarshal.list b/gobject/gmarshal.list
index 270a9eb..4a5ddf5 100644
--- a/gobject/gmarshal.list
+++ b/gobject/gmarshal.list
@@ -1,6 +1,9 @@
 # Note: This file used to generate gmarshal.[ch], but it doesn't any
-# longer.  Now that we have g_cclosure_marshal_generic(), there's no
-# reason to use these.  They're kept for ABI compatibility.
+# longer; it is kept mainly for backward compatibility purposes. If
+# you find yourself in the need to add a marshaller in GObject, use
+# g_cclosure_marshal_generic() instead.
+#
+# Warning: The generated symbols are part of the GObject ABI.
 
 # standard VOID return marshallers
 VOID:VOID