Don't allocate size to invisible BinLayout children
Don't allocate size to invisible BinLayout children

This is similar to what other layouts do, and avoids problems with
Gtk+ actor children which warn about being allocated not enough
space.

heysion/clutter-clone,heysion/clutter-clone,djdeath/clutter-android,heysion/clutter-clone,collects/clutter,collects/clutter,ebassi/clutter,Distrotech/clutter,GNOME/clutter,jigpu/clutter,jigpu/clutter,djdeath/clutter,heysion/clutter-clone,ebassi/clutter,ebassi/clutter,Distrotech/clutter,Distrotech/clutter,collects/clutter,Distrotech/clutter,Distrotech/clutter,collects/clutter,GNOME/clutter,jigpu/clutter,djdeath/clutter-android,jigpu/clutter,collects/clutter,djdeath/clutter-android,ebassi/clutter,jigpu/clutter,jigpu/clutter,djdeath/clutter-android,djdeath/clutter,ebassi/clutter,djdeath/clutter,djdeath/clutter,GNOME/clutter,djdeath/clutter,djdeath/clutter-android,Distrotech/clutter,heysion/clutter-clone,GNOME/clutter,djdeath/clutter,GNOME/clutter