soft link loops

[Björn Spruck <Bjoern Spruck exp2 physik uni-giessen de>]

Hi,

(meld 1.6.1, ubuntu 13.4)

If meld is started in/on a git repository ("meld ."), which contains a 
soft link loop (like "ln -s . loop"), it will scan nearly endlessly.

Even if started on a normal directory containing a softlink, it will 
only work on a first look.
If you click on "unversioned files" you will see that meld will loop 
into the softlink trap, too.

mkdir test ; cd test ; ln -s . loop ; meld .