[goffice] FormatSel: another deprecation.

[Morten Welinder <mortenw src gnome org>]

commit 6eeb61cd4f49a968c50c90c9607db493acf8fe8f
Author: Morten Welinder <terra gnome org>
Date:   Sun Dec 28 17:48:16 2014 -0500

    FormatSel: another deprecation.

 goffice/gtk/go-format-sel.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/goffice/gtk/go-format-sel.c b/goffice/gtk/go-format-sel.c
index ddab987..fc10d35 100644
--- a/goffice/gtk/go-format-sel.c
+++ b/goffice/gtk/go-format-sel.c
@@ -1513,15 +1513,18 @@ nfs_init (GOFormatSel *gfs)
                PangoContext *context;
                GtkWidget *w = GTK_WIDGET (gfs->format.preview);
                gint char_width;
+               PangoFontDescription *font_desc;
 
                /* request width in number of chars */
+               gtk_style_context_get (gtk_widget_get_style_context (w), GTK_STATE_FLAG_NORMAL,
+                                      "font", &font_desc, NULL);
                context = gtk_widget_get_pango_context (w);
-               metrics = pango_context_get_metrics (context,
-                                                    gtk_style_context_get_font (gtk_widget_get_style_context 
(w), GTK_STATE_FLAG_NORMAL),
+               metrics = pango_context_get_metrics (context, font_desc,
                                                     pango_context_get_language (context));
                char_width = pango_font_metrics_get_approximate_char_width (metrics);
                gtk_widget_set_size_request (w, PANGO_PIXELS (char_width) * FORMAT_PREVIEW_MAX, -1);
                pango_font_metrics_unref (metrics);
+               pango_font_description_free (font_desc);
        }
        gfs->format.preview_buffer = gtk_text_view_get_buffer (gfs->format.preview);
        go_create_std_tags_for_buffer (gfs->format.preview_buffer);