Videoview image size depends on former image size

[Sh4kE]

steps to reproduce:

1. load three pictures with three different sizes
2. go from the the smallest image to the middle one
3. go from the biggest image to the middle one
4. now the middle sized image has a different size than in the first run

[Sh4kE]

I forgot to mention that to get the error you should not resize the window.

[jutanke]

We need to discuss what the correct behavior should be in this case: and: is this even a valid use case (images of different size)> If not we need to make sure that it is not possible to load an image stream with such properties