[gimp/gimp-2-6] Guard against g_file_info_get_icon() returning NULL

[Sven Neumann <neo src gnome org>]

commit d72a318a2c582a6b17e9327a5c1d72167b0b2d91
Author: Michael Natterer <mitch gimp org>
Date:   Tue Sep 22 20:25:11 2009 +0200

    Guard against g_file_info_get_icon() returning NULL
    
    It can return NULL, but should not for a proper gvfs backend; add a
    returning NULL.
    (cherry picked from commit 295f345b2eca4b224f51192632e0bc2060c6e07d)

 app/widgets/gimpviewrendererimagefile.c |   20 +++++++++++++++-----
 1 files changed, 15 insertions(+), 5 deletions(-)
---
diff --git a/app/widgets/gimpviewrendererimagefile.c b/app/widgets/gimpviewrendererimagefile.c
index 8d2a893..ca84911 100644
--- a/app/widgets/gimpviewrendererimagefile.c
+++ b/app/widgets/gimpviewrendererimagefile.c
@@ -167,9 +167,8 @@ gimp_view_renderer_imagefile_get_icon (GimpImagefile *imagefile,
 #if GTK_CHECK_VERSION (2, 13, 4)
   if (! pixbuf)
     {
-      GFile       *file;
-      GFileInfo   *file_info;
-      GtkIconInfo *info;
+      GFile     *file;
+      GFileInfo *file_info;
 
       file = g_file_new_for_uri (gimp_object_get_name (GIMP_OBJECT (imagefile)));
       file_info = g_file_query_info (file, "standard::icon", 0, NULL, NULL);
@@ -180,8 +179,19 @@ gimp_view_renderer_imagefile_get_icon (GimpImagefile *imagefile,
 
           icon = g_file_info_get_icon (file_info);
 
-          info = gtk_icon_theme_lookup_by_gicon (icon_theme, icon, size, 0);
-          pixbuf = gtk_icon_info_load_icon (info, NULL);
+          if (icon)
+            {
+              GtkIconInfo *info;
+
+              info = gtk_icon_theme_lookup_by_gicon (icon_theme, icon, size, 0);
+              pixbuf = gtk_icon_info_load_icon (info, NULL);
+            }
+          else
+            {
+#ifdef GIMP_UNSTABLE
+              g_printerr ("no icon for: %s\n", gimp_object_get_name (imagefile));
+#endif
+            }
 
           g_object_unref (file_info);
         }