ProjectNodes: Move vcsTopic to where it belongs

It's a nonsensical operation on anything but ProjectNodes

Change-Id: Id02682e6dde99c5a08362dac0f6286282cfc15b6
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/projectexplorer/projectmodels.cpp

@@ -265,9 +265,10 @@ QVariant FlatModel::data(const QModelIndex &index, int role) const
         case Qt::DisplayRole: {
             QString name = node->displayName();
 
-            if (node->parentFolderNode()
+            if (node->nodeType() == ProjectNodeType
+                    && node->parentFolderNode()
                     && node->parentFolderNode()->nodeType() == SessionNodeType) {
-                const QString vcsTopic = node->vcsTopic();
+                const QString vcsTopic = static_cast<ProjectNode *>(node)->vcsTopic();
 
                 if (!vcsTopic.isEmpty())
                     name += QLatin1String(" [") + vcsTopic + QLatin1Char(']');

src/plugins/projectexplorer/projectnodes.cpp

@@ -145,11 +145,6 @@ QString Node::displayName() const
     return QFileInfo(path()).fileName();
 }
 
-QString Node::vcsTopic() const
-{
-    return QString();
-}
-
 QString Node::tooltip() const
 {
     return QDir::toNativeSeparators(path());

src/plugins/projectexplorer/projectnodes.h

@@ -85,7 +85,6 @@ public:
     QString path() const;                 // file system path
     virtual int line() const;
     virtual QString displayName() const;
-    virtual QString vcsTopic() const;
     virtual QString tooltip() const;
     virtual bool isEnabled() const;