[tdf#42982]Improve runtimeException's Message

Change-Id: Ieb1bc302c2c1093561082704e26e3ff3b648db91
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/122902
Tested-by: Jenkins
Reviewed-by: Michael Stahl <michael.stahl@allotropia.de>

vbahelper/source/vbahelper/vbaeventshelperbase.cxx

@@ -277,7 +277,7 @@ OUString VbaEventsHelperBase::getEventHandlerPath( const EventHandlerInfo& rInfo
         break;
 
         default:
-            throw uno::RuntimeException(); // unsupported module type
+            throw uno::RuntimeException("This module type is unsupported"); // unsupported module type
     }
 
     /*  Performance improvement: Check the list of existing event handlers