coverity#735502 Logically dead code

Change-Id: I386944df28c7e7464e596144a5612a205f5cb967
Reviewed-on: https://gerrit.libreoffice.org/8789Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>

svl/source/numbers/zformat.cxx

@@ -199,7 +199,7 @@ sal_uInt8 SvNumberNatNum::MapDBNumToNatNum( sal_uInt8 nDBNum, LanguageType eLang
     eLang &= 0x03FF;    // 10 bit primary language
     if ( bDate )
     {
-        if ( nDBNum == 4 && eLang == LANGUAGE_KOREAN )
+        if ( nDBNum == 4 && eLang == (LANGUAGE_KOREAN & 0x03FF) )
         {
             nNatNum = 9;
         }