[gnome-shell] ShellApp: use st_icon_set_fallback_icon_name() to specify app fallback

[Cosimo Cecchi <cosimoc src gnome org>]

commit f812e9be7dede591bba082ffb8c141373f9ec6c0
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Sat Mar 14 15:44:54 2015 -0700

    ShellApp: use st_icon_set_fallback_icon_name() to specify app fallback
    
    We can now safely pass a NULL GIcon to st_icon_set_gicon(), and specify
    a more generic fallback using the new API we just introduced.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=746219

 src/shell-app.c |   12 ++----------
 1 files changed, 2 insertions(+), 10 deletions(-)
---
diff --git a/src/shell-app.c b/src/shell-app.c
index abea69f..9c03a4a 100644
--- a/src/shell-app.c
+++ b/src/shell-app.c
@@ -216,18 +216,10 @@ shell_app_create_icon_texture (ShellApp   *app,
 
   ret = st_icon_new ();
   st_icon_set_icon_size (ST_ICON (ret), size);
+  st_icon_set_fallback_icon_name (ST_ICON (ret), "application-x-executable");
 
   icon = g_app_info_get_icon (G_APP_INFO (app->info));
-  if (icon != NULL)
-    {
-      st_icon_set_gicon (ST_ICON (ret), icon);
-    }
-  else
-    {
-      icon = g_themed_icon_new ("application-x-executable");
-      st_icon_set_gicon (ST_ICON (ret), icon);
-      g_object_unref (icon);
-    }
+  st_icon_set_gicon (ST_ICON (ret), icon);
 
   return ret;
 }