Silence some compiler warnings
Silence some compiler warnings

collects/cogl,Distrotech/cogl,djdeath/cogl,djdeath/cogl-android,djdeath/cogl-android,Distrotech/cogl,gcampax/cogl,spatulasnout/cogl,gcampax/cogl,collects/cogl,Distrotech/cogl,spatulasnout/cogl,gcampax/cogl,djdeath/cogl-android,gcampax/cogl,Distrotech/cogl,djdeath/cogl,djdeath/cogl