Transformations of parent objects of sequences cause problems

[w1th0utnam3]

Steps to reproduce:

• Add a sequence to the scene using the sequence loader
• Create a new object (e.g. an Empty)
• Parent the sequence to the Empty
• Apply a transform to the Empty (e.g. 0.5x scaling in all directions)
• Jump around between different frames

What happens: Somehow on every frame change the inverse transform of the parent is applied to the sequence. So e.g. if the parent has a scaling of 0.5x, the sequence is scaled by a factor of 2.0x. This accumulates over multiple frame changes.