Drawing the screen: UpdateViewWithFade

       Name: UpdateViewWithFade                                      [Show more]
       Type: Subroutine
   Category: Drawing the screen
    Summary: Fade the screen to black, if required, hide all sprites and update
             the view
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * BRIS calls UpdateViewWithFade
             * BRIS_b0 calls UpdateViewWithFade
             * TT210 calls UpdateViewWithFade


.UpdateViewWithFade

 JSR SetScreenForUpdate ; Get the screen ready for updating by hiding all
                        ; sprites, after fading the screen to black if we are
                        ; changing view

                        ; Fall through into UpdateView to update the view