if no uuid for the terminal is available, use write the id of the terminal to the xml file, otherwise no connection can be done after saving

sources/qetgraphicsitem/terminal.cpp

@@ -706,6 +706,10 @@ bool Terminal::canBeLinkedTo(Terminal *other_terminal)
 	return true;
 }
 
+void Terminal::setID(int id) {
+    m_id = id;
+}
+
 /**
 	@brief Terminal::conductors
 	@return La liste des conducteurs lies a cette borne
@@ -811,6 +815,10 @@ QUuid Terminal::uuid() const {
 	return d->m_uuid;
 }
 
+int Terminal::ID() const {
+    return m_id;
+}
+
 QPointF Terminal::dockPos() {
     return dock_elmt_;
 }