Fix a warning in DEBUG code
Fix a warning in DEBUG code

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