geoadmin/mf-geoadmin3 — pull request #119 by elemoine (2013-07-12 06:05:14+00:00)
Title: make outputs an error message if no "last git branch"

make will output the following error message

```
cat: .build-artefacts/last-git-branch: No such file or directory
```

if there's not "last git branch", after a make clean for example.

Please review.