qgv: fix -Wreordering

Signed-off-by: Martin Zenzes <martin.zenzes@dfki.de>

QGVCore/QGVEdge.cpp

@@ -23,7 +23,7 @@ License along with this library.
 #include <QDebug>
 #include <QPainter>
 
-QGVEdge::QGVEdge(QGVEdgePrivate *edge, QGVScene *scene) :  _edge(edge), _scene(scene)
+QGVEdge::QGVEdge(QGVEdgePrivate *edge, QGVScene *scene) :  _scene(scene), _edge(edge)
 {
     setFlag(QGraphicsItem::ItemIsSelectable, true);
 }

QGVCore/QGVNode.cpp

@@ -23,7 +23,7 @@ License along with this library.
 #include <QDebug>
 #include <QPainter>
 
-QGVNode::QGVNode(QGVNodePrivate *node, QGVScene *scene): _node(node), _scene(scene)
+QGVNode::QGVNode(QGVNodePrivate *node, QGVScene *scene): _scene(scene), _node(node)
 {
     setFlag(QGraphicsItem::ItemIsSelectable, true);
 }

QGVCore/QGVSubGraph.cpp

@@ -24,7 +24,7 @@ License along with this library.
 #include <QDebug>
 #include <QPainter>
 
-QGVSubGraph::QGVSubGraph(QGVGraphPrivate *subGraph, QGVScene *scene): _sgraph(subGraph), _scene(scene)
+QGVSubGraph::QGVSubGraph(QGVGraphPrivate *subGraph, QGVScene *scene):  _scene(scene), _sgraph(subGraph)
 {
     //setFlag(QGraphicsItem::ItemIsSelectable, true);
 }