Fix liblink tests after recent commit.

NOTE: This needs new tests, no time now, will do tomorrow.

tests/python/bl_blendfile_liblink.py

@@ -211,8 +211,7 @@ class TestBlendLibAppendBasic(TestBlendLibLinkHelper):
                           instance_object_data=False, set_fake=False, use_recursive=False, do_reuse_local_id=False)
 
         assert(len(bpy.data.meshes) == 1)
-        # This one fails currently, for unclear reasons.
-        assert(bpy.data.meshes[0].library is not None)
+        assert(bpy.data.meshes[0].library is None)
         assert(bpy.data.meshes[0].users == 1)
         assert(len(bpy.data.objects) == 1)
         assert(bpy.data.objects[0].library is None)