[dconf] client: clean up some Vala issues

[Ryan Lortie <ryanl src gnome org>]

commit 543ce2ba293eb732b95ddbcab2dbd601d5d5b9ed
Author: Ryan Lortie <desrt desrt ca>
Date:   Sun Feb 5 15:51:07 2012 -0500

    client: clean up some Vala issues
    
    We had a workaround for a Vala bug that has been fixed, so remove that.
    Add another workaround because Vala cannot be certain that a particular
    value has been set or not (so just set it to null to stop the warning).

 client/dconf-client.vala |   20 +++++++-------------
 1 files changed, 7 insertions(+), 13 deletions(-)
---
diff --git a/client/dconf-client.vala b/client/dconf-client.vala
index 472e544..fea10d7 100644
--- a/client/dconf-client.vala
+++ b/client/dconf-client.vala
@@ -35,6 +35,8 @@ namespace DConf {
 		void call_sync (EngineMessage dcem, out string tag, Cancellable? cancellable) throws Error {
 			DBusConnection connection;
 
+			tag = null;
+
 			if (dcem.bus_types[0] == 'e') {
 				if (session == null) {
 					session = Bus.get_sync (BusType.SESSION, cancellable);
@@ -66,6 +68,8 @@ namespace DConf {
 		async void call_async (EngineMessage dcem, out string tag, Cancellable? cancellable) throws Error {
 			DBusConnection connection;
 
+			tag = null;
+
 			if (dcem.bus_types[0] == 'e') {
 				if (session == null) {
 					session = yield Bus.get (BusType.SESSION, cancellable);
@@ -123,12 +127,7 @@ namespace DConf {
 		 * tag that appears in change notifications.
 		 **/
 		public bool write (string key, Variant? value, out string tag = null, Cancellable? cancellable = null) throws Error {
-			if (&tag == null) { /* bgo #591673 */
-				string junk;
-				call_sync (engine.write (key, value), out junk, cancellable);
-			} else {
-				call_sync (engine.write (key, value), out tag, cancellable);
-			}
+			call_sync (engine.write (key, value), out tag, cancellable);
 			return true;
 		}
 
@@ -173,12 +172,7 @@ namespace DConf {
 		 * tag that appears in change notifications.
 		 **/
 		public bool write_many (string dir, [CCode (array_length = false, array_null_terminated = true)] string[] rels, Variant?[] values, out string? tag = null, Cancellable? cancellable = null) throws Error {
-			if (&tag == null) { /* bgo #591673 */
-				string junk;
-				call_sync (engine.write_many (dir, rels, values), out junk, cancellable);
-			} else {
-				call_sync (engine.write_many (dir, rels, values), out tag, cancellable);
-			}
+			call_sync (engine.write_many (dir, rels, values), out tag, cancellable);
 			return true;
 		}
 
@@ -359,7 +353,7 @@ namespace DConf {
 		 **/
 		public Client (string? profile = null, owned WatchFunc? watch_func = null) {
 			engine = new Engine (profile);
-			this.watch_func = watch_func;
+			this.watch_func = (owned) watch_func;
 		}
 	}