Auto merge of #781 - fkaa:fix-typo, r=kvark
Auto merge of #781 - fkaa:fix-typo, r=kvark

Fix typo on extension checking

Doesn't actually check if there is such an extension at all, so typos aren't caught.

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