when last==first==0 then mass erase is executed, it's faster. the page marking was wrong in this case. Change-Id: I5c579d59b5c4778cf057cb5986e086abdd4209b2 Signed-off-by: Rodrigo L. Rosa <rodrigorosa.lg@gmail.com> Reviewed-on: http://openocd.zylin.com/232 Tested-by: jenkins Reviewed-by: Øyvind Harboe <oyvindharboe@gmail.com>tags/v0.6.0-rc1