Gstreamer: Fix undeclared identifier QGstVideoRendererSink in 0.10 ver

Task-number: QTBUG-70465
Change-Id: I6af46cb8de0b40dc41aaa0b999faf68d102c7b48
Reviewed-by: Christian Stromme <christian.stromme@qt.io>

src/gsttools/qgstreamervideorenderer.cpp

@@ -113,7 +113,7 @@ void QGstreamerVideoRenderer::setSurface(QAbstractVideoSurface *surface)
         if (m_surface) {
             connect(m_surface.data(), SIGNAL(supportedFormatsChanged()),
                     this, SLOT(handleFormatChange()));
-            QGstVideoRendererSink::setSurface(m_surface);
+            QVideoSurfaceGstSink::setSurface(m_surface);
         }
 
         if (wasReady != isReady())

src/multimedia/gsttools_headers/qvideosurfacegstsink_p.h

@@ -139,6 +139,7 @@ public:
     GstVideoSink parent;
 
     static QVideoSurfaceGstSink *createSink(QAbstractVideoSurface *surface);
+    static void setSurface(QAbstractVideoSurface *surface) { Q_UNUSED(surface); }
 
 private:
     static GType get_type();