Fix build with poppler-23.05.

--- filters/karbon/pdf/PdfImport.cpp.orig
+++ filters/karbon/pdf/PdfImport.cpp
@@ -73,8 +73,8 @@ KoFilter::ConversionStatus PdfImport::convert(const QB
     if (! globalParams)
         return KoFilter::NotImplemented;
 
-    GooString * fname = new GooString(QFile::encodeName(m_chain->inputFile()).data());
-    PDFDoc * pdfDoc = new PDFDoc(fname, 0, 0, 0);
+    PDFDoc * pdfDoc = new PDFDoc(std::make_unique<GooString>(QFile::encodeName(m_chain->inputFile()).data()),
+				 std::nullopt, std::nullopt, 0);
     if (! pdfDoc) {
 #ifdef HAVE_POPPLER_PRE_0_83
         delete globalParams;
