geometry fx 72 - iris shutter can't close all the way

[reagan]

i notice geometry fx 72 - iris shutter can't close all the way to black. it can get down to an opening about 50 pixels wide but it would be nice if it could close all the way when a scale of 0 is applied. it can't close all the way for some reason. bug? limitation?

[samsc]

noone ever asked for it to be closed.

Ill change it- if i can without it affecting anything else.

Thanks