[gtkmm] PaperSize: Correct the PaperSizeTraits pre-declaration.

[Murray Cumming <murrayc src gnome org>]

commit 0eec6fd533ef14f661fa143a57cf4b01d881be1f
Author: Murray Cumming <murrayc murrayc com>
Date:   Wed Mar 14 11:41:46 2012 +0100

    PaperSize: Correct the PaperSizeTraits pre-declaration.
    
    * gtk/src/papersize.hg: PaperSizeTraits is a struct, not a class.
    clang++ noticed this while building Glom, though I have no run it on all of
    gtkmm.

 ChangeLog            |    8 ++++++++
 gtk/src/papersize.hg |    2 +-
 2 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 3787d73..04bff47 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2012-03-14  Murray Cumming  <murrayc murrayc com>
+
+	PaperSize: Correct the PaperSizeTraits pre-declaration.
+
+	* gtk/src/papersize.hg: PaperSizeTraits is a struct, not a class.
+	clang++ noticed this while building Glom, though I have no run it on all of 
+	gtkmm.
+
 2012-03-13  Albert Chin <thewrittenword.com>
 
 	TreeView: Work around a HP-UX aCC compiler error.
diff --git a/gtk/src/papersize.hg b/gtk/src/papersize.hg
index 7112a73..6629639 100644
--- a/gtk/src/papersize.hg
+++ b/gtk/src/papersize.hg
@@ -24,7 +24,7 @@ namespace Gtk
 {
 
 #ifndef DOXYGEN_SHOULD_SKIP_THIS
-class PaperSizeTraits;
+struct PaperSizeTraits;
 #endif
 
 /** Common paper names, from PWG 5101.1-2002 PWG: Standard for Media Standardized Names