"Don't Override" material option not working

[leandro_cs]

Hi,

The option "Don't override" inside material settings seems to be not working over global material override settings.
Test file: https://dl.dropboxusercontent.com/u/...de_issue.blend

Tested in:
Blender 2.69
Vray 3.01 and 2.40.01

[bdancer]

Thanks fixed!