ddraw: When changing the back buffers also update the render target.

dlls/ddraw/device.c

@@ -308,6 +308,11 @@ IDirect3DDeviceImpl_7_Release(IDirect3DDevice7 *iface)
         /* Restore the render targets */
         if(This->OffScreenTarget)
         {
+            /* Set the device up to render to the front buffer since the back buffer will
+             * vanish soon.
+             */
+            IWineD3DDevice_SetRenderTarget(This->wineD3DDevice, 0,
+                                           This->ddraw->d3d_target->WineD3DSurface);
             /* This->target is the offscreen target.
              * This->ddraw->d3d_target is the target used by DDraw
              */

dlls/ddraw/direct3d.c

@@ -855,6 +855,10 @@ IDirect3DImpl_7_CreateDevice(IDirect3D7 *iface,
         if(hr != D3D_OK)
             ERR("(%p) Error %08x setting the front and back buffer\n", This, hr);
 
+        /* Render to the back buffer */
+        IWineD3DDevice_SetRenderTarget(This->wineD3DDevice, 0,
+                                       target->WineD3DSurface);
+
         object->OffScreenTarget = TRUE;
     }
     else