[Libreoffice] Help fixing ImplHandleInputLangChange implementation

Hi all,

I'd like to fix this function implementation, as it makes my eyes cry ;)

Notice that if pFrame == NULL, the function will crash anyway because
it's only checked in the first if block and later is dereferenced.

static void ImplHandleInputLangChange( HWND hWnd, WPARAM, LPARAM lParam )
{
    ImplSalYieldMutexAcquireWithWait();

    // Feststellen, ob wir IME unterstuetzen
    WinSalFrame* pFrame = GetWindowPtr( hWnd );
    if ( pFrame && pFrame->mbIME && pFrame->mhDefIMEContext )
    {
        HKL     hKL = (HKL)lParam;
        UINT    nImeProps = ImmGetProperty( hKL, IGP_PROPERTY );

        pFrame->mbSpezIME = (nImeProps & IME_PROP_SPECIAL_UI) != 0;
        pFrame->mbAtCursorIME = (nImeProps & IME_PROP_AT_CARET) != 0;
        pFrame->mbHandleIME = !pFrame->mbSpezIME;
    }

    // trigger input language and codepage update
    UINT nLang = pFrame->mnInputLang;
    ImplUpdateInputLang( pFrame );

    // notify change
    if( nLang != pFrame->mnInputLang )
        pFrame->CallCallback( SALEVENT_INPUTLANGUAGECHANGE, 0 );

    ImplSalYieldMutexRelease();
}

What's the preferred way to fix it?

a) put everything in an if (pFrame) {....} block
b) if(!pFrame) return;

Thanks for the help! :)

-- 
Jesús Corrius <jesus@softcatala.org>
Document Foundation founding member
Mobile: +34 661 11 38 26
Skype: jcorrius | Twitter: @jcorrius