[rygel/rygel-0-16] mpris: Don't crash on faulty MPRIS implementation

[Jens Georg <jensgeorg src gnome org>]

commit 28df893d99b53e7b4c3a6142efd4dff25b8ca7d0
Author: Jens Georg <jensg openismus com>
Date:   Tue Oct 9 13:26:52 2012 +0200

    mpris: Don't crash on faulty MPRIS implementation
    
    Fixes:
        https://bugzilla.gnome.org/show_bug.cgi?id=685196

 src/plugins/mpris/rygel-mpris-plugin.vala |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/src/plugins/mpris/rygel-mpris-plugin.vala b/src/plugins/mpris/rygel-mpris-plugin.vala
index 587e037..6e45700 100644
--- a/src/plugins/mpris/rygel-mpris-plugin.vala
+++ b/src/plugins/mpris/rygel-mpris-plugin.vala
@@ -32,8 +32,8 @@ public class Rygel.MPRIS.Plugin : Rygel.MediaRendererPlugin {
 
     public PlayerProxy actual_player;
 
-    public string[] mime_types;
-    public string[] protocols;
+    public string[]? mime_types;
+    public string[]? protocols;
 
     public Plugin (string      service_name,
                    PlayerProxy actual_player) {
@@ -54,7 +54,11 @@ public class Rygel.MPRIS.Plugin : Rygel.MediaRendererPlugin {
         return new MPRIS.Player (this);
     }
 
-    private string[] schemes_to_protocols (string[] schemes) {
+    private string[]? schemes_to_protocols (string[] schemes) {
+        if (schemes == null) {
+            return null;
+        }
+
         var protocols = new string[schemes.length];
 
         for (var i = 0; i < schemes.length; i++) {