Fix a corner case in etag code.
Fix a corner case in etag code.

themoritz/cabal,martinvlk/cabal,mydaum/cabal,plumlife/cabal,corngood/cabal,enolan/cabal,themoritz/cabal,Peaker/cabal,kolmodin/cabal,rimmington/cabal,typelead/epm,Peaker/cabal,eric-stanley/cabal,themoritz/cabal,Helkafen/cabal,triplepointfive/cabal,plow-technologies/cabal,typelead/epm,fpco/cabal,fugyk/cabal,Heather/cabal,mightybyte/cabal,mmakowski/cabal,ghc-android/cabal,enolan/cabal,kolmodin/cabal,valderman/cabal,bennofs/cabal,seereason/cabal,Helkafen/cabal,mightybyte/cabal,eric-stanley/cabal,randen/cabal,mmakowski/cabal,christiaanb/cabal,x-y-z/cabal,triplepointfive/cabal,thomie/cabal,plumlife/cabal,gridaphobe/cabal,plow-technologies/cabal,ghc-android/cabal,bennofs/cabal,ian-ross/cabal,edsko/cabal,beni55/cabal,sopvop/cabal,ian-ross/cabal,lukexi/cabal,anton-dessiatov/cabal,beni55/cabal,Heather/cabal,thoughtpolice/cabal,edsko/cabal,christiaanb/cabal,anton-dessiatov/cabal,gbaz/cabal,x-y-z/cabal,thoughtpolice/cabal,thomie/cabal,randen/cabal,gbaz/cabal,garetxe/cabal,sopvop/cabal,gridaphobe/cabal,valderman/cabal,fpco/cabal,fugyk/cabal,kosmikus/cabal,martinvlk/cabal,lukexi/cabal,headprogrammingczar/cabal,mydaum/cabal,corngood/cabal,trskop/cabal,headprogrammingczar/cabal,kosmikus/cabal,trskop/cabal,seereason/cabal,garetxe/cabal,rimmington/cabal,sopvop/cabal