fix warnings
fix warnings

ml9951/ghc,spacekitteh/smcghc,anton-dessiatov/ghc,holzensp/ghc,mettekou/ghc,mfine/ghc,christiaanb/ghc,TomMD/ghc,ghc-android/ghc,vikraman/ghc,holzensp/ghc,spacekitteh/smcghc,acowley/ghc,tibbe/ghc,mcschroeder/ghc,sgillespie/ghc,vikraman/ghc,oldmanmike/ghc,gridaphobe/ghc,sdiehl/ghc,snoyberg/ghc,vikraman/ghc,da-x/ghc,ezyang/ghc,oldmanmike/ghc,frantisekfarka/ghc-dsi,ghc-android/ghc,elieux/ghc,forked-upstream-packages-for-ghcjs/ghc,hferreiro/replay,sdiehl/ghc,TomMD/ghc,christiaanb/ghc,da-x/ghc,mettekou/ghc,spacekitteh/smcghc,ezyang/ghc,wxwxwwxxx/ghc,anton-dessiatov/ghc,da-x/ghc,gcampax/ghc,fmthoma/ghc,olsner/ghc,oldmanmike/ghc,sdiehl/ghc,gridaphobe/ghc,ghc-android/ghc,ryantm/ghc,wxwxwwxxx/ghc,jstolarek/ghc,gridaphobe/ghc,siddhanathan/ghc,tjakway/ghcjvm,anton-dessiatov/ghc,AlexanderPankiv/ghc,sdiehl/ghc,elieux/ghc,nomeata/ghc,TomMD/ghc,shlevy/ghc,nushio3/ghc,mcschroeder/ghc,snoyberg/ghc,nathyong/microghc-ghc,nathyong/microghc-ghc,fmthoma/ghc,ekmett/ghc,tibbe/ghc,ekmett/ghc,wxwxwwxxx/ghc,green-haskell/ghc,shlevy/ghc,oldmanmike/ghc,oldmanmike/ghc,mettekou/ghc,acowley/ghc,spacekitteh/smcghc,snoyberg/ghc,GaloisInc/halvm-ghc,mfine/ghc,bitemyapp/ghc,mettekou/ghc,frantisekfarka/ghc-dsi,vTurbine/ghc,fmthoma/ghc,ghc-android/ghc,bitemyapp/ghc,snoyberg/ghc,gcampax/ghc,nushio3/ghc,mettekou/ghc,vTurbine/ghc,nkaretnikov/ghc,holzensp/ghc,forked-upstream-packages-for-ghcjs/ghc,snoyberg/ghc,nkaretnikov/ghc,TomMD/ghc,mettekou/ghc,urbanslug/ghc,lukexi/ghc,nushio3/ghc,elieux/ghc,anton-dessiatov/ghc,mfine/ghc,oldmanmike/ghc,hferreiro/replay,AlexanderPankiv/ghc,shlevy/ghc,TomMD/ghc,ml9951/ghc,forked-upstream-packages-for-ghcjs/ghc,elieux/ghc,frantisekfarka/ghc-dsi,hferreiro/replay,ml9951/ghc,sdiehl/ghc,lukexi/ghc,green-haskell/ghc,lukexi/ghc-7.8-arm64,nushio3/ghc,tjakway/ghcjvm,nkaretnikov/ghc,bitemyapp/ghc,gridaphobe/ghc,ezyang/ghc,ekmett/ghc,lukexi/ghc-7.8-arm64,mcschroeder/ghc,ryantm/ghc,urbanslug/ghc,acowley/ghc,ekmett/ghc,tjakway/ghcjvm,sgillespie/ghc,GaloisInc/halvm-ghc,nushio3/ghc,da-x/ghc,forked-upstream-packages-for-ghcjs/ghc,ghc-android/ghc,olsner/ghc,sdiehl/ghc,AlexanderPankiv/ghc,mcschroeder/ghc,mfine/ghc,tibbe/ghc,ml9951/ghc,tibbe/ghc,tjakway/ghcjvm,gridaphobe/ghc,urbanslug/ghc,bitemyapp/ghc,siddhanathan/ghc,christiaanb/ghc,vikraman/ghc,jstolarek/ghc,anton-dessiatov/ghc,ezyang/ghc,siddhanathan/ghc,elieux/ghc,wxwxwwxxx/ghc,anton-dessiatov/ghc,olsner/ghc,nomeata/ghc,ml9951/ghc,vikraman/ghc,tjakway/ghcjvm,tjakway/ghcjvm,siddhanathan/ghc,sgillespie/ghc,GaloisInc/halvm-ghc,forked-upstream-packages-for-ghcjs/ghc,anton-dessiatov/ghc,AlexanderPankiv/ghc,sgillespie/ghc,green-haskell/ghc,holzensp/ghc,mcschroeder/ghc,fmthoma/ghc,hferreiro/replay,sgillespie/ghc,urbanslug/ghc,green-haskell/ghc,AlexanderPankiv/ghc,nkaretnikov/ghc,shlevy/ghc,lukexi/ghc-7.8-arm64,urbanslug/ghc,GaloisInc/halvm-ghc,ezyang/ghc,lukexi/ghc-7.8-arm64,AlexanderPankiv/ghc,mcschroeder/ghc,holzensp/ghc,bitemyapp/ghc,snoyberg/ghc,nathyong/microghc-ghc,hferreiro/replay,lukexi/ghc,vikraman/ghc,GaloisInc/halvm-ghc,gcampax/ghc,snoyberg/ghc,fmthoma/ghc,acowley/ghc,ezyang/ghc,olsner/ghc,sgillespie/ghc,da-x/ghc,nathyong/microghc-ghc,GaloisInc/halvm-ghc,ryantm/ghc,shlevy/ghc,gcampax/ghc,wxwxwwxxx/ghc,shlevy/ghc,christiaanb/ghc,sgillespie/ghc,fmthoma/ghc,da-x/ghc,gridaphobe/ghc,nkaretnikov/ghc,ryantm/ghc,mfine/ghc,fmthoma/ghc,ryantm/ghc,siddhanathan/ghc,olsner/ghc,frantisekfarka/ghc-dsi,sdiehl/ghc,ghc-android/ghc,vTurbine/ghc,nomeata/ghc,siddhanathan/ghc,jstolarek/ghc,TomMD/ghc,urbanslug/ghc,ml9951/ghc,jstolarek/ghc,olsner/ghc,spacekitteh/smcghc,mettekou/ghc,ezyang/ghc,urbanslug/ghc,nushio3/ghc,jstolarek/ghc,elieux/ghc,nathyong/microghc-ghc,vTurbine/ghc,hferreiro/replay,vTurbine/ghc,TomMD/ghc,acowley/ghc,ml9951/ghc,lukexi/ghc,GaloisInc/halvm-ghc,ghc-android/ghc,tibbe/ghc,nkaretnikov/ghc,nkaretnikov/ghc,nomeata/ghc,mfine/ghc,shlevy/ghc,forked-upstream-packages-for-ghcjs/ghc,nathyong/microghc-ghc,ml9951/ghc,mfine/ghc,elieux/ghc,frantisekfarka/ghc-dsi,christiaanb/ghc,gcampax/ghc,acowley/ghc,vTurbine/ghc,ekmett/ghc,mcschroeder/ghc,hferreiro/replay,olsner/ghc,nathyong/microghc-ghc,wxwxwwxxx/ghc,gridaphobe/ghc,wxwxwwxxx/ghc,acowley/ghc,vTurbine/ghc,vikraman/ghc,AlexanderPankiv/ghc,nomeata/ghc,gcampax/ghc,gcampax/ghc,christiaanb/ghc,oldmanmike/ghc,christiaanb/ghc,lukexi/ghc,green-haskell/ghc,tjakway/ghcjvm,lukexi/ghc-7.8-arm64,siddhanathan/ghc,nushio3/ghc,forked-upstream-packages-for-ghcjs/ghc,da-x/ghc