RFC: changes to -i flag for finding source files

[Herbert Valerio Riedel]

On 2014-05-30 at 11:00:38 +0200, John Meacham wrote:
> JHC has the feature that
>
> Graphics.UI.GTK.Button can live in any of:
>
> Graphics/UI/GTK/Button.hs
> Graphics/UI/GTK.Button.hs
> Graphics/UI.GTK.Button.hs
> Graphics.UI.GTK.Button.hs

Just wondering: Does JHC warn if, for instance,
`Graphics/UI/GTK/Button.hs` as well as `Graphics.UI.GTK.Button.hs` exists?