x11/stage: Leave a comment about multi-head setup
x11/stage: Leave a comment about multi-head setup

The get_geometry() implementation is broken on multi-head systems; the
only solution is to use XRandR to get the size of the CRTC that contains
the stage.

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