[goffice] Fixed gog-styled-object.c compilation.

[Jean Bréfort <jbrefort src gnome org>]

commit 4e6406ce4aadcd566f473220014a188b37880ec7
Author: Jean Brefort <jean brefort normalesup org>
Date:   Mon Mar 8 13:40:22 2010 +0100

    Fixed gog-styled-object.c compilation.

 goffice/graph/gog-styled-object.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/goffice/graph/gog-styled-object.c b/goffice/graph/gog-styled-object.c
index 72ed072..ed72c45 100644
--- a/goffice/graph/gog-styled-object.c
+++ b/goffice/graph/gog-styled-object.c
@@ -40,7 +40,9 @@ enum {
  * This is a mere copy of GOStyle but is needed for file
  * format compatibility
  **/
-typedef struct _GogStyle GogStyle;
+struct _GogStyle {
+	GOStyle base;
+};
 typedef GObjectClass GogStyleClass;
 GType gog_style_get_type (void);
 GSF_CLASS (GogStyle, gog_style,