When scripts are sleeping, don't count that as execution time

Sleeping doesn't use the CPU.

OpenSim/Region/ScriptEngine/Interfaces/IScriptApi.cs

@@ -26,6 +26,7 @@
  */
 
 using System;
+using System.Diagnostics;
 using System.Threading;
 using OpenMetaverse;
 using OpenSim.Framework;
@@ -45,7 +46,9 @@ namespace OpenSim.Region.ScriptEngine.Interfaces
         /// <param name='host'>/param>
         /// <param name='item'>/param>
         /// <param name='coopSleepHandle'>/param>
+        /// <param name="executionTimer">The timer used to measure how long the script has executed</param>
         void Initialize(
-            IScriptEngine scriptEngine, SceneObjectPart host, TaskInventoryItem item, WaitHandle coopSleepHandle);
+            IScriptEngine scriptEngine, SceneObjectPart host, TaskInventoryItem item, WaitHandle coopSleepHandle,
+            Stopwatch executionTimer);
     }
 }