Fix typo on extension checking
Fix typo on extension checking

red75prime/gfx,tanderegg/gfx,ColinKinloch/gfx,alexcrichton/gfx,davll/gfx,JohnColanduoni/gfx,gfx-rs/gfx-rs,tempbottle/gfx,mitchmindtree/gfx-rs,tanderegg/gfx,sectopod/gfx-rs,aepsil0n/gfx-rs,bvssvni/gfx-rs,JohnColanduoni/gfx,Bastacyclop/gfx,ColinKinloch/gfx