[pango] Bug 589133 – Firefox 3.5 complains about invalid weak references

[Behdad Esfahbod <behdad src gnome org>]

commit 1eadda908f0f9262dcb4c301f487b5a190dc0e54
Author: Behdad Esfahbod <behdad behdad org>
Date:   Mon Jul 20 16:49:16 2009 -0400

    Bug 589133 â?? Firefox 3.5 complains about invalid weak references

 pango/pangofc-font.c |   13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)
---
diff --git a/pango/pangofc-font.c b/pango/pangofc-font.c
index 1b210cd..8fc5a57 100644
--- a/pango/pangofc-font.c
+++ b/pango/pangofc-font.c
@@ -45,6 +45,7 @@ struct _PangoFcFontPrivate
   PangoFcDecoder *decoder;
   PangoFcFontKey *key;
   PangoFcCmapCache *cmap_cache;
+  gboolean has_weak_pointer; /* have set a weak_pointer from fontmap to us */
 };
 
 static gboolean pango_fc_font_real_has_char  (PangoFcFont *font,
@@ -142,7 +143,11 @@ pango_fc_font_finalize (GObject *object)
   if (fcfont->fontmap)
     {
       _pango_fc_font_map_remove (PANGO_FC_FONT_MAP (fcfont->fontmap), fcfont);
-      g_object_remove_weak_pointer (G_OBJECT (fcfont->fontmap), (gpointer *) (gpointer) &fcfont->fontmap);
+      if (priv->has_weak_pointer)
+        {
+	  priv->has_weak_pointer = FALSE;
+	  g_object_remove_weak_pointer (G_OBJECT (fcfont->fontmap), (gpointer *) (gpointer) &fcfont->fontmap);
+	}
       fcfont->fontmap = NULL;
     }
 
@@ -224,7 +229,11 @@ pango_fc_font_set_property (GObject       *object,
 	g_return_if_fail (fcfont->fontmap == NULL);
 	fcfont->fontmap = (PangoFontMap *) fcfontmap;
 	if (fcfont->fontmap)
-	  g_object_add_weak_pointer (G_OBJECT (fcfont->fontmap), (gpointer *) (gpointer) &fcfont->fontmap);
+	  {
+	    PangoFcFontPrivate *priv = fcfont->priv;
+	    priv->has_weak_pointer = TRUE;
+	    g_object_add_weak_pointer (G_OBJECT (fcfont->fontmap), (gpointer *) (gpointer) &fcfont->fontmap);
+	  }
       }
       goto set_decoder;