Verify that it's possible to create ImageView with nullptr data.
Verify that it's possible to create ImageView with nullptr data.

For example for old-style texture allocation using setImage(). Asserts
now.

MiUishadow/magnum,MiUishadow/magnum,MiUishadow/magnum,DerThorsten/magnum,MiUishadow/magnum,DerThorsten/magnum,MiUishadow/magnum,DerThorsten/magnum,MiUishadow/magnum,DerThorsten/magnum,DerThorsten/magnum