texture: don't use a static bool to gate warning
texture: don't use a static bool to gate warning

in create_pick_material we were using a static boolean to gate when we
show a warning, but that would mean if the problem recurs between
different textures then the warning will only be shown once. We now have
a private bitfield flag instead, just so we don't spew millions of
warnings if the problem is recurring.

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