When scripts generate expected exceptions (e.g. due to checked bad parameter) throw ScriptException instead of just a plain old exception.

This is to make it easier to distinguish these exceptions from unexpected OpenSimulator problems internally and in regression tests.
No functional changes.

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

@@ -210,7 +210,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
 
         internal void OSSLError(string msg)
         {
-            throw new Exception("OSSL Runtime Error: " + msg);
+            throw new ScriptException("OSSL Runtime Error: " + msg);
         }
 
         /// <summary>