oracle provider: replace rownum=0 with 1=0 to retrieve columns (fixes #9633)
add QgsRasterLayer::previewAsImage() for MTR rendering (see bug 9626)
don't open the identify dialog beforehand if 'Open feature form, if a single feature is identified' is active and there is only one result (fixes #9631)
* remove deprecated overloads QgsRasterLayer::lastError() and QgsRasterLayer::lastErrorTitle()
* deprecate QgsRasterLayer::previewAsPixmap() (doesn't work in background threads)
* QImage::fill( QColor ) does not exists prior to Qt 4.8
diff --git a/src/core/raster/qgsrasterlayerrenderer.h b/src/core/raster/qgsrasterlayerrenderer.h
index 6ab4a49..40a27a2 100644
--- a/src/core/raster/qgsrasterlayerrenderer.h
+++ b/src/core/raster/qgsrasterlayerrenderer.h
@@ -8,7 +8,7 @@ class QPainter;
 class QgsMapToPixel;
 class QgsRasterLayer;
 class QgsRasterPipe;
-class QgsRasterViewPort;
+struct QgsRasterViewPort;
 class QgsRenderContext;

 class QgsRasterLayerRenderer : public QgsMapLayerRenderer