Fix error kindly pointed out by @koto
Fix error kindly pointed out by @koto

https://github.com/cryptocat/cryptocat/commit/e22d394a2237cb70e2f59dedf9
d77f04a3763404#commitcomment-5396821

wakermahmud/cryptocat,PeterDaveHello/cryptocat,Raynes/cryptocat,arno01/cryptocat,arno01/cryptocat,DoNotUseThisCodeJUSTFORKS/cryptocat,Raynes/cryptocat,DoNotUseThisCodeJUSTFORKS/cryptocat,DGO143/cryptocat,Cryptodog/cryptocat,wakermahmud/cryptocat,DGO143/cryptocat,Raynes/cryptocat,DoNotUseThisCodeJUSTFORKS/cryptocat,Cryptodog/cryptocat,PeterDaveHello/cryptocat,DGO143/cryptocat