[commit: Cabal] master: Fix fallout of Num / Show class changes in ghc-7.4 (5dfa57a)

[Ian Lynagh]

Repository : ssh://darcs.haskell.org//srv/darcs/packages/Cabal

On branch  : master

http://hackage.haskell.org/trac/ghc/changeset/5dfa57a2c58c9cffb3cb7ac79966a6cb57eac559

>---------------------------------------------------------------

commit 5dfa57a2c58c9cffb3cb7ac79966a6cb57eac559
Author: Duncan Coutts <duncan at community.haskell.org>
Date:   Fri Nov 4 00:25:10 2011 +0000

    Fix fallout of Num / Show class changes in ghc-7.4

>---------------------------------------------------------------

 cabal-install/Distribution/Client/Tar.hs |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/cabal-install/Distribution/Client/Tar.hs b/cabal-install/Distribution/Client/Tar.hs
index 7063292..327cfbb 100644
--- a/cabal-install/Distribution/Client/Tar.hs
+++ b/cabal-install/Distribution/Client/Tar.hs
@@ -743,7 +743,7 @@ putString :: FieldWidth -> String -> String
 putString n s = take n s ++ fill (n - length s) '\NUL'
 
 --TODO: check integer widths, eg for large file sizes
-putOct :: Integral a => FieldWidth -> a -> String
+putOct :: (Show a, Integral a) => FieldWidth -> a -> String
 putOct n x =
   let octStr = take (n-1) $ showOct x ""
    in fill (n - length octStr - 1) '0'