Comment 12 for bug 334141

So I'm working on moving my pixbuf scaling code into notify-osd, and I noticed in bubble.c bubble_set_icon_from_pixbuf() doesn't appear to unref pixbufs under all conditions, and it seems very likely that we're leaking pixbufs here.

I'm not sure how useful it is to apply this patch since I'm planning to change this code to preserve the aspect ratio when scaling pixbufs. But here it is anyway.