Fix string parameters to functions taking lists as arguments. LSL

functions return CLI strings, which, in the case of lists, don't
get wrapped. Therefore, the list had to be able to deal with
that CLI type here. The correct fix would be to change all LSL
function returns to LSL types.

OpenSim/Region/ScriptEngine/Shared/LSL_Types.cs

@@ -448,6 +448,10 @@ namespace OpenSim.Region.ScriptEngine.Shared
               {
                 return (LSL_Types.key)m_data[itemIndex];
               }
+              else if (m_data[itemIndex] is String)
+              {
+                return new LSL_Types.LSLString((string)m_data[itemIndex]);
+              }
               else
               {
                 return (LSL_Types.LSLString)m_data[itemIndex];