warp/ReadInt.hs : Fix compile problem with ghc-7.4.
warp/ReadInt.hs : Fix compile problem with ghc-7.4.

coypoop/wai,sordina/wai,AndrewRademacher/wai,soenkehahn/wai,frontrowed/wai,soenkehahn/wai,erikd/wai,urbanslug/wai,coypoop/wai,utdemir/wai,dylex/wai,beni55/wai,jberryman/wai,frontrowed/wai,erikd/wai,sol/wai,awpr/wai,awpr/wai,tolysz/wai,AndrewRademacher/wai,yesodweb/wai,creichert/wai,coypoop/wai,erikd/wai,ygale/wai,utdemir/wai,rgrinberg/wai,jberryman/wai,utdemir/wai,ygale/wai,rgrinberg/wai,tolysz/wai,rgrinberg/wai,mfine/wai,urbanslug/wai,awpr/wai,dylex/wai,creichert/wai,rgrinberg/wai,beni55/wai,frontrowed/wai,sol/wai,mfine/wai,AndrewRademacher/wai,awpr/wai,iquiw/wai,soenkehahn/wai,sordina/wai,iquiw/wai,coypoop/wai,sordina/wai,sordina/wai,tolysz/wai,mfine/wai,ygale/wai,kazu-yamamoto/wai,beni55/wai,utdemir/wai,dylex/wai,yesodweb/wai,rgrinberg/wai,AndrewRademacher/wai,iquiw/wai,frontrowed/wai,jberryman/wai,dylex/wai,erikd/wai,iquiw/wai,tolysz/wai,sol/wai,soenkehahn/wai,jberryman/wai,beni55/wai,mfine/wai,urbanslug/wai,kazu-yamamoto/wai,ygale/wai,urbanslug/wai