- optimizations in function redraw_area() - if a screen update is needed after i/o writes, now redraw_area() is called instead   of duplicating the code
- optimizations in function redraw_area()
- if a screen update is needed after i/o writes, now redraw_area() is called instead
  of duplicating the code

dariaphoebe/bochs,dbrashear/bochs,dariaphoebe/bochs,dariaphoebe/bochs,dbrashear/bochs,dariaphoebe/bochs,dbrashear/bochs,dbrashear/bochs,dariaphoebe/bochs,dbrashear/bochs