add a a missing monitor.wait if still not needed, mb in future

diff --git a/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs b/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs
index 21299f3..9de5c43 100644
--- a/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs
+++ b/OpenSim/Region/CoreModules/World/Archiver/Tests/ArchiverTests.cs
@@ -759,9 +759,14 @@ namespace OpenSim.Region.CoreModules.World.Archiver.Tests
                 byte[] archive = archiveWriteStream.ToArray();
                 MemoryStream archiveReadStream = new MemoryStream(archive);

-                Dictionary<string, object> archiveOptions = new Dictionary<string, object>();
-                archiveOptions.Add("merge", null);
-                m_archiverModule.DearchiveRegion(archiveReadStream, Guid.Empty, archiveOptions);
+                lock (this)
+                {
+                    m_scene.EventManager.OnOarFileLoaded += LoadCompleted;
+                    Dictionary<string, object> archiveOptions = new Dictionary<string, object>();
+                    archiveOptions.Add("merge", null);
+                    m_archiverModule.DearchiveRegion(archiveReadStream, Guid.Empty, archiveOptions);
+                    Monitor.Wait(this, 60000);
+                }

                 SceneObjectPart object1Existing = m_scene.GetSceneObjectPart(part1.Name);
                 Assert.That(object1Existing, Is.Not.Null, "object1 was not present after merge");