Fix remaining Qt6 build errors after PR #540

- qetxml.h: add missing <QUuid> include (used in propertyUuid/
  createXmlProperty signatures but never included directly).
- machine_info.cpp: fix ambiguous QString/int operator> in
  send_info_to_debug() for it1/it2/it3; just count every
  matching file found instead of the meaningless comparison.

sources/machine_info.cpp

@@ -192,10 +192,8 @@ void MachineInfo::send_info_to_debug()
 	QDirIterator it1(QETApp::commonElementsDir().toLatin1(),nameFilters,  QDir::Files, QDirIterator::Subdirectories);
 			while (it1.hasNext())
 			{
-				if(it1.next() > 0 )
+				it1.next();
-				{
 				commomElementsDir ++;
-				}
 			}
 	qInfo()<< " Common Elements count:"<< commomElementsDir << "Elements";
 	
@@ -204,10 +202,8 @@ void MachineInfo::send_info_to_debug()
 	QDirIterator it2(QETApp::customElementsDir().toLatin1(), nameFilters, QDir::Files, QDirIterator::Subdirectories);
 			while (it2.hasNext())
 			{
-				if(it2.next() > 0 )
+				it2.next();
-				{
 				customElementsDir ++;
-				}
 			}
 	qInfo()<< " Custom Elements count:"<< customElementsDir << "Elements";
 	
@@ -215,10 +211,8 @@ void MachineInfo::send_info_to_debug()
 	QDirIterator it3(QETApp::companyElementsDir().toLatin1(), nameFilters, QDir::Files, QDirIterator::Subdirectories);
 			while (it3.hasNext())
 			{
-				if(it3.next() > 0 )
+				it3.next();
-				{
 				companyElementsDir ++;
-				}
 			}
 	qInfo()<< " Company Elements count:"<< companyElementsDir << "Elements";
 	

sources/qetxml.h

@@ -20,6 +20,7 @@
 
 #include <QDomElement>
 #include <QPen>
+#include <QUuid>
 
 class QDomDocument;
 class QDir;