clan-tidy bugprone-throw-keyword-missing in SubmissionPropertyHandler

warning: suspicious exception object created but not thrown; did you
mean 'throw IllegalArgumentException'?

looks like a mistake in
    commit cd5b9568
    Date:   Tue Mar 14 10:33:39 2006 +0000
    INTEGRATION: CWS pbrwuno (1.3.88); FILE MERGED

Change-Id: I828501f32b3caff8c4ca05a8a8c4b063dccecd3b
Reviewed-on: https://gerrit.libreoffice.org/60196
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

extensions/source/propctrlr/submissionhandler.cxx

@@ -280,7 +280,7 @@ namespace pcr
         if ( !_rxControlFactory.is() )
             throw NullPointerException();
         if ( !m_pHelper.get() )
-            RuntimeException();
+            throw RuntimeException();
 
         std::vector< OUString > aListEntries;
         PropertyId nPropId( impl_getPropertyId_throwUnknownProperty( _rPropertyName ) );