Remove a compiler warning
Remove a compiler warning

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