Why do we need a png file for gnome-session?

[Calvin Liu <Calvin Liu Sun COM>]

Hi, there,

When I was build garnome-nightly or garnome-2.8.0, the
desktop/gnome-session always failed because couldn't download the .bz2 file.

I manually downloaded one gnome-session.xxx.tar.bz2 file to the
desktop/gnome-session/download folder and run "make" in
desktop/gnome-session but it still failed. Then I noticed in
garnome-2.5.92, there's a "garnome-0.17.0.png" in the download folder so
I copied it to that folder of 2.8.0. Then the build continued.

My question is why do we need such a png file?

Thanks.
Calvin