Bugfix SoSFImage::setValue(). Set size and number of components even if size == (0,0).
Bugfix SoSFImage::setValue(). Set size and number of components even
if size == (0,0).

Fixed by pederb.

Alexpux/Coin3D,Alexpux/Coin3D,Alexpux/Coin3D,Alexpux/Coin3D