coverity#706531 Uncaught exception

Change-Id: Ibcd5d2b4124ab441a90748588d063f394b1ef372

extensions/source/propctrlr/propeventtranslation.cxx

@@ -46,7 +46,7 @@ namespace pcr
         ,m_xTranslatedEventSource( _rxTranslatedEventSource )
     {
         if ( !m_xDelegator.is() )
-            throw NullPointerException();
+            throw RuntimeException();
     }