[bin] Don't draw child when there's no space
[bin] Don't draw child when there's no space

If we have zero space available, don't draw the child. I don't think
there'd be a situation where this would be undesired behaviour and it
fixes animations where you shrink bins with labels inside of them.

pwithnall/mx,jonnylamb/mx,pwithnall/mx,clutter-project/mx,clutter-project/mx,pwithnall/mx,jonnylamb/mx,clutter-project/mx,clutter-project/mx,jonnylamb/mx,jonnylamb/mx,pwithnall/mx