Fix wrong size of ClientFormat::U10U10U10U2
Fix wrong size of ClientFormat::U10U10U10U2

christopheraugustus/glium,sdotz/glium,cpjreynolds/glium,nicokoch/glium,tomaka/glium,binsoftware/glium,carbidegames/glium,caldwell/glium,rozaliev/glium,bvssvni/glium,glium/glium,TyOverby/glium,acolley/glium