Translate German comment to English

Change-Id: Ia7970d9318c0e9f738d7cdf646de2dd38f869a3c
Reviewed-on: https://gerrit.libreoffice.org/42847Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>
Tested-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

sw/source/core/docnode/section.cxx

@@ -877,7 +877,7 @@ static bool lcl_SectionCmpPos( const SwSection *pFirst, const SwSection *pSecond
     OSL_ENSURE( pFSectFormat && pSSectFormat &&
             pFSectFormat->GetContent(false).GetContentIdx() &&
             pSSectFormat->GetContent(false).GetContentIdx(),
-                "ungueltige Sections" );
+                "Invalid sections" );
     return pFSectFormat->GetContent(false).GetContentIdx()->GetIndex() <
                   pSSectFormat->GetContent(false).GetContentIdx()->GetIndex();
 }