[totem] backend: Fix incorrect return type

[Bastien Nocera <hadess src gnome org>]

commit d0ddf00e535385e9bb0ffebbee7c29f76b1bfdff
Author: Bjørn Lie <bjorn lie gmail com>
Date:   Thu Nov 19 10:52:40 2015 +0100

    backend: Fix incorrect return type
    
    This function does not need a return so change it from static gchar to static void.
    Without this change rpmlint complains about a missing return statement.
    
    [  421s] totem-debugsource-3.18.1-214.7.x86_64
    [  421s] ... running 01-check-debuginfo
    [  421s] ... testing for empty debuginfo packages
    [  421s] ... running 02-check-gcc-output
    [  421s] ... testing for serious compiler warnings
    [  421s]     (using /usr/lib/build/checks-data/check_gcc_output)
    [  421s]     (using //.build.log)
    [  421s]
    [  421s] I: Program returns random data in a function
    [  421s] E: totem no-return-in-nonvoid-function bacon-video-widget-gst-missing-plugins.c:253
    [  421s]
    [  421s] I: Program returns random data in a function
    [  421s] E: totem no-return-in-nonvoid-function bacon-video-widget-gst-missing-plugins.c:253
    [  421s] ### WATCHDOG MARKER START ###
    [  425s] [  389.730291] sysrq: SysRq : Power Off
    [  425s] [  389.888475] reboot: Power down
    [  427s] ### WATCHDOG MARKER END ###
    
    https://bugzilla.gnome.org/show_bug.cgi?id=758324

 .../bacon-video-widget-gst-missing-plugins.c       |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/backend/bacon-video-widget-gst-missing-plugins.c 
b/src/backend/bacon-video-widget-gst-missing-plugins.c
index ade7bf8..db083a8 100644
--- a/src/backend/bacon-video-widget-gst-missing-plugins.c
+++ b/src/backend/bacon-video-widget-gst-missing-plugins.c
@@ -240,7 +240,7 @@ on_plugin_installation_done (GstInstallPluginsReturn res, gpointer user_data)
 
 #ifdef GDK_WINDOWING_X11
 #if GST_CHECK_VERSION (1, 5, 0)
-static gchar *
+static void
 set_startup_notification_id (GstInstallPluginsContext *install_ctx)
 {
        gchar *startup_id;