fix callgrind crash

after commit 96ef1973
    loplugin:useuniqueptr in SwTextPortion::CreateHyphen

Change-Id: Idb3b652c328ca20d049a1002088ded797f8ed098
Reviewed-on: https://gerrit.libreoffice.org/60517
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sw/source/core/text/txthyph.cxx

@@ -331,7 +331,7 @@ bool SwTextPortion::CreateHyphen( SwTextFormatInfo &rInf, SwTextGuess const &rGu
         SetLen( aInf.GetLen() );
         CalcTextSize( aInf );
 
-        Insert( pHyphPor.get() );
+        Insert( pHyphPor.release() );
 
         short nKern = rInf.GetFont()->CheckKerning();
         if( nKern )