QmlDesigner.StatesEditor: fix warnings

Task-number: QTCREATORBUG-10955
Change-Id: I6a382ed7935463c71103ca51a0a5b4822ab8cfc0
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/plugins/qmldesigner/components/stateseditor/stateseditorimageprovider.cpp

@@ -42,17 +42,20 @@ StatesEditorImageProvider::StatesEditorImageProvider()
 
 QImage StatesEditorImageProvider::requestImage(const QString &id, QSize *size, const QSize &requestedSize)
 {
-    if (m_nodeInstanceView.isNull())
-        return QImage();
-
-    if (!m_nodeInstanceView->model())
-        return QImage(); //NodeInstanceView might be detached
 
     QSize newSize = requestedSize;
 
     if (newSize.isEmpty())
         newSize = QSize (100, 100);
 
+    if (m_nodeInstanceView.isNull() || !m_nodeInstanceView->model()) {
+        //NodeInstanceView might be detached
+        //Return white QImage
+        QImage image(newSize, QImage::Format_ARGB32);
+        image.fill(0xFFFFFFFF);
+        return image;
+    }
+
     QString imageId = id.split(QLatin1Char('-')).first();
     QImage image;
 

src/plugins/qmldesigner/components/stateseditor/stateslist.qml

@@ -397,7 +397,6 @@ Rectangle {
     Component {
         id: underlay
         Item {
-            anchors.fill:parent
             property variant color: parent.color
             clip:true
             Rectangle {