Fix resume scripts.

On resume, we need to place requeue the script for event processing if there are any events on the queue.
Also need to do this under m_Script lock in order to avoid a race

OpenSim/Region/ScriptEngine/Shared/Instance/ScriptInstance.cs

@@ -55,7 +55,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
 {
     public class ScriptInstance : MarshalByRefObject, IScriptInstance
     {
-//        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
         
         private IScriptEngine m_Engine;
         private IScriptWorkItem m_CurrentResult = null;
@@ -138,7 +138,31 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
             set { m_RunEvents = value; }
         }
 
-        public bool Suspended { get; set; }
+        public bool Suspended
+        {
+            get { return m_Suspended; }
+
+            set
+            {
+                // Need to do this inside a lock in order to avoid races with EventProcessor()
+                lock (m_Script)
+                {
+                    bool wasSuspended = m_Suspended;
+                    m_Suspended = value;
+    
+                    if (wasSuspended && !m_Suspended)
+                    {
+                        lock (m_EventQueue)
+                        {
+                            // Need to place ourselves back in a work item if there are events to process
+                            if ((m_EventQueue.Count > 0) && m_RunEvents && (!m_ShuttingDown))
+                                m_CurrentResult = m_Engine.QueueEventHandler(this);
+                        }
+                    }
+                }
+            }
+        }
+        private bool m_Suspended;
 
         public bool ShuttingDown
         {
@@ -645,13 +669,13 @@ namespace OpenSim.Region.ScriptEngine.Shared.Instance
         /// <returns></returns>
         public object EventProcessor()
         {
+            lock (m_Script)
+            {
 //                m_log.DebugFormat("[XEngine]: EventProcessor() invoked for {0}.{1}", PrimName, ScriptName);
 
                 if (Suspended)
                     return 0;
 
-            lock (m_Script)
-            {
                 EventParams data = null;
 
                 lock (m_EventQueue)