This fixes a boundary case error in the strided list

implementation. If the range included only a single item
  an empty list was always returned (has no-one been using
  this function?)

Signed-off-by: dr scofield (aka dirk husemann) <drscofield@xyzzyxyzzy.net>

OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs

@@ -5041,6 +5041,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
                     }
                 }
             }
+            else
+            {
+                result.Add(src.Data[start]);
+            }
 
             return result;
         }