Fix the 'index.cache' up-to-date check.
Fix the 'index.cache' up-to-date check.

Comparison was using (>) instead of (>=). Bug introduced in 272a5c2c.
Fixes #1443.

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