fix !HAVE_FEATURE_PDFIUM build

Change-Id: Ied661aafbaf9d85b01ef57e83bbacd9f9a828f2b
diff --git a/vcl/source/filter/ipdf/pdfread.cxx b/vcl/source/filter/ipdf/pdfread.cxx
index 07e9d89..5c34132 100644
--- a/vcl/source/filter/ipdf/pdfread.cxx
+++ b/vcl/source/filter/ipdf/pdfread.cxx
@@ -180,7 +180,7 @@ bool getCompatibleStream(SvStream& rInStream, SvStream& rOutStream,
    return rOutStream.good();
}
#else
bool generatePreview(SvStream& rStream, Bitmap& rBitmap
bool generatePreview(SvStream& rStream, Bitmap& rBitmap,
                     sal_uInt64 nPos, sal_uInt64 nSize)
{
    (void)rStream;