[fixed] Author field misbehaves on custom tracks

[Wuzzy]

Okay, this is a minor bug in the dev version:

There is an area where the authors of the track are shown. The bug occours when you click on a track for which there is no author given, the author in this field is not shown correctly.

Steps to reproduce:

1. Click on a pre-installed track (where the author name is given)
2. Note the contents author field
3. Click on a custom track (with no author given)
4. Note the contents of the author field again

Expected: You see an empty field.
Actual result: You see whatever the track you selected on step 1 had.

[CryHam]

Right. It is wrong. It shows just the last track's author. Should be empty. Will fix.

[CryHam]

fixed.