[rygel/config] Allow get_string() params/return to be null.

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit e23ce89f0d8c9aa33897e1e3c25816455a018717
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Tue Apr 21 17:41:05 2009 +0300

    Allow get_string() params/return to be null.
---
 src/rygel/rygel-config-reader.vala |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/rygel/rygel-config-reader.vala b/src/rygel/rygel-config-reader.vala
index 3b93ca6..d32dab7 100644
--- a/src/rygel/rygel-config-reader.vala
+++ b/src/rygel/rygel-config-reader.vala
@@ -62,9 +62,9 @@ public class Rygel.ConfigReader {
         return this.get_string (section, "UDN", new_udn);
     }
 
-    private string get_string (string section,
-                               string key,
-                               string default_value) {
+    private string? get_string (string  section,
+                                string  key,
+                                string? default_value) {
         string val;
         var path = ROOT_GCONF_PATH + section + "/" + key;