Fix warnings in cmm/CLabel.hs
Fix warnings in cmm/CLabel.hs

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