Fix build with poppler-26.01.0.

Index: sdext/source/pdfimport/xpdfwrapper/pdfioutdev_gpl.cxx
--- sdext/source/pdfimport/xpdfwrapper/pdfioutdev_gpl.cxx.orig
+++ sdext/source/pdfimport/xpdfwrapper/pdfioutdev_gpl.cxx
@@ -232,7 +232,7 @@ static void writeJpeg_( OutputBuffer& o_rOutputBuf, St
     str = ((DCTStream *)str)->getRawStream();
 #endif
 #if POPPLER_CHECK_VERSION(25, 2, 0)
-    if (!str->reset())
+    if (!str->rewind())
         return;
 #else
     str->reset();
@@ -273,7 +273,7 @@ static void writePbm_(OutputBuffer& o_rOutputBuf, Stre
 
     // initialize stream
 #if POPPLER_CHECK_VERSION(25, 2, 0)
-    if (!str->reset())
+    if (!str->rewind())
         return;
 #else
     str->reset();
@@ -335,7 +335,7 @@ static void writePpm_( OutputBuffer&     o_rOutputBuf,
                         colorMap->getNumPixelComps(),
                         colorMap->getBits()));
 #if POPPLER_CHECK_VERSION(25, 2, 0)
-    if (!imgStr->reset())
+    if (!imgStr->rewind())
         return;
 #else
     imgStr->reset();
