[script] add world only option on training script for DR-GAN on Multi-PIE

bob/learn/pytorch/scripts/train_drgan_multipie.py

@@ -122,7 +122,8 @@ def main(user_input=None):
   # WARNING with the transforms ... act on labels too, at some point, I may have to write my own
   # Also, in 'ToTensor', there is a reshape performed from: HxWxC to CxHxW
   face_dataset = MultiPIEDataset(root_dir=multipie_root_dir, 
-                                 frontal_only=False, 
+                                 frontal_only=False,
+                                 world=False,
                                  transform=transforms.Compose([
                                    RollChannels(), # bob to skimage:  
                                    ToTensor(),