Damage surface before attaching new buffer
Damage surface before attaching new buffer

This reverts cde9bfc80545030a6e5e4579a1adc7263ab7bfe8.  We need to damage the
area covered by the old surface when attaching a new buffer.  The new surface
area will be damaged by the client.

sir-murray/weston,Fantu/compositor-spice,Gnurou/weston,giucam/weston,Gnurou/weston,jonnylamb/weston,Fantu/compositor-spice,eyolfson/weston,eyolfson/weston,giucam/weston,Tarnyko/weston-xdg_surface_present,udoprog/weston,mchalupa/weston,krezovic/weston,krezovic/weston,sir-murray/weston,kwm81/weston,xorgy/weston,udoprog/weston,Tarnyko/weston-xdg_surface_present,kwm81/weston,Fantu/compositor-spice,xorgy/weston,jonnylamb/weston,mchalupa/weston