Fix with poppler-26.01.0 -- poppler-26.04.0.

From https://gitlab.com/KrIr17/inkscape/-/commits/poppler_26_04_1.4.3

Index: src/extension/internal/pdfinput/pdf-input.cpp
--- src/extension/internal/pdfinput/pdf-input.cpp.orig
+++ src/extension/internal/pdfinput/pdf-input.cpp
@@ -33,6 +33,7 @@
 #include <poppler/glib/poppler.h>
 #include <poppler/glib/poppler-document.h>
 #include <poppler/glib/poppler-page.h>
+#include <poppler/goo/gmem.h>
 #endif
 
 #include <gdkmm/general.h>
