Can't disable pre_z

[cloudwu]

目前在 graphic_settings.ant 里面关闭 pre_z 会报错：

graphic:
  disable_pre_z:true

[2024-08-24 23:32:54.36][ERROR]( ant.window|window ) attempt to index a nil value (local 'dq')
stack traceback:
	( service:7 )
	C:/project/ant/pkg/ant.render/preprocess/ssao.lua:219: in upvalue 'update_ao_frame_properties'
	C:/project/ant/pkg/ant.render/preprocess/ssao.lua:283: in local 'f'
	C:/project/ant/pkg/ant.world/main.lua:477: in field '_pipeline_update'
	C:/project/ant/pkg/ant.world/main.lua:589: in method 'pipeline_update'
	C:/project/ant/pkg/ant.window/service/window.lua:81: in upvalue 'f'

@junjie020 记得查一下这个问题。