fix: Initialization of image axes for 2D MetaImage
fix: Initialization of image axes for 2D MetaImage

Signed-off-by: Andreas Schuh <2f2b1020847044dc1f292a96d004ddd85a6b7ba6@gmail.com>

BioMedIA/MIRTK,schuhschuh/MIRTK,BioMedIA/MIRTK,BioMedIA/MIRTK,schuhschuh/MIRTK,BioMedIA/MIRTK,schuhschuh/MIRTK,schuhschuh/MIRTK