[ekiga] Fix crash when the new message sound key is unset

[Eugen Dedu <ededu src gnome org>]

commit 7d54888028eff84a1e476f9794cbe50f5ba343ad
Author: Eugen Dedu <Eugen Dedu pu-pm univ-fcomte fr>
Date:   Tue Apr 2 10:23:09 2013 +0200

    Fix crash when the new message sound key is unset
    
    I think that the user unset the key through gconf-editor.  Anyway,
    this also cleans up the code, now play_file is only used in
    preferences code, as it should.

 src/gui/main_window.cpp |    9 +--------
 1 files changed, 1 insertions(+), 8 deletions(-)
---
diff --git a/src/gui/main_window.cpp b/src/gui/main_window.cpp
index 14f43da..d729861 100644
--- a/src/gui/main_window.cpp
+++ b/src/gui/main_window.cpp
@@ -859,14 +859,7 @@ on_chat_unread_alert (G_GNUC_UNUSED GtkWidget* widget,
                      gpointer self)
 {
   EkigaMainWindow *mw = EKIGA_MAIN_WINDOW (self);
-
-  if (!gm_conf_get_bool (SOUND_EVENTS_KEY "enable_new_message_sound"))
-    return;
-
-  std::string file_name_string = gm_conf_get_string (SOUND_EVENTS_KEY "new_message_sound");
-
-  if (!file_name_string.empty ())
-    mw->priv->audiooutput_core->play_file(file_name_string);
+  mw->priv->audiooutput_core->play_event("new_message_sound");
 }