hallgren 1dbe588497 Restore compatibility with ghc-7.4 ...

With ghc-7.4 'import M hiding (x)' causes an error if M does not export x...

2015-02-16 15:41:38 +00:00

..

Data

Restore compatibility with ghc-7.4

2015-02-16 15:41:38 +00:00