shared: document*.cpp: Fix type mismatch, causing problems in qt6

shared/documentoutlineentry.cpp

@@ -19,7 +19,7 @@ QDataStream &operator>>(QDataStream &in, DocumentOutlineEntry &pd)
 {
 	in >> pd.text >> pd.type >> pd.destinationPage;
 
-	int numChildren;
+	qsizetype numChildren;
 	in >> numChildren;
 	for(int i = 0; i < numChildren; i++)
 	{

shared/documentprocessresult.cpp

@@ -1,5 +1,5 @@
 #include "documentprocessresult.h"
-
+#include <QDebug>
 QDataStream &operator<<(QDataStream &out, const DocumentProcessResult &pd)
 {
 	out << pd.pages.size();
@@ -17,7 +17,7 @@ QDataStream &operator<<(QDataStream &out, const DocumentProcessResult &pd)
 
 QDataStream &operator>>(QDataStream &in, DocumentProcessResult &pd)
 {
-	int numPages, numOutlines;
+	qsizetype numPages, numOutlines;
 	in >> numPages;
 	in >> numOutlines;