Mantis#1437. Patch one of four. Thank you kindly, Melanie for:

Corrects the XEngine's script startup semantics.
Completes llRequestAgentData
Implements llDetectedLink
Fixes a few minor issues

OpenSim/Region/ScriptEngine/XEngine/AsyncCommandPlugins/SensorRepeat.cs

@@ -322,6 +322,7 @@ namespace OpenSim.Region.ScriptEngine.XEngine.AsyncCommandPlugins
                     int idx;
                     for (idx = 0; idx < SensedObjects.Length; idx++)
                     {
+                        detect[idx] = new XDetectParams();
                         detect[idx].Key=(LLUUID)(SensedObjects.Data[idx]);
                     }