Clean up argument parsing GError handling
Clean up argument parsing GError handling

Pass a GError in, so that clutter_init() can effectively print out a
critical warning on initialization failure, like it used to do in the
olden days.

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