Ensure FieldLoader is left in its original state when loading Settings.

OpenRA.Game/Settings.cs

@@ -288,7 +288,8 @@ namespace OpenRA
 			// Override fieldloader to ignore invalid entries
 			var err1 = FieldLoader.UnknownFieldAction;
 			var err2 = FieldLoader.InvalidValueAction;
-
+			try
+			{
 				FieldLoader.UnknownFieldAction = (s, f) => Console.WriteLine("Ignoring unknown field `{0}` on `{1}`".F(s, f.Name));
 
 				if (File.Exists(settingsFile))
@@ -305,10 +306,13 @@ namespace OpenRA
 					foreach (var f in kv.Value.GetType().GetFields())
 						if (args.Contains(kv.Key + "." + f.Name))
 							FieldLoader.LoadField(kv.Value, f.Name, args.GetValue(kv.Key + "." + f.Name, ""));
-
+			}
+			finally
+			{
 				FieldLoader.UnknownFieldAction = err1;
 				FieldLoader.InvalidValueAction = err2;
 			}
+		}
 
 		public void Save()
 		{