relink assets folder

Often after cloning the repository of a LibGDX project, the assets folder of the desktop project is linked to an invalid location. That's because the path it was linked to is absolute in eclipse. You will have to delete it and link it with the assets folder of the android project again:

1. delete proj-desktop/assets (it's just a link)
2. right-click proj-desktop -> "Properties..."
3. select "Java Build Path" from list on the left
4. go to "Source" tab
5. click "Link Source..." button on the right
6. click "Browse..." and select proj-android/assets
7. click "Finish" in bottom right
8. click "OK" in bottom right