patch: inconsistent logic for when to log zeros loss

Author: Jemoka

stanza/models/coref/model.py

@@ -516,7 +516,7 @@ def train(self, log=False):
 
                 running_c_loss += c_loss.item()
                 running_s_loss += s_loss.item()
-                if res.zero_scores.size(0) == 0:
+                if res.zero_scores.size(0) != 0:
                     running_z_loss += z_loss.item()
 
                 # log every 100 docs
@@ -525,7 +525,7 @@ def train(self, log=False):
                         'train_c_loss': c_loss.item(),
                         'train_s_loss': s_loss.item(),
                     }
-                    if res.zero_scores.size(0) == 0:
+                    if res.zero_scores.size(0) != 0:
                         logged['train_z_loss'] = z_loss.item()
                     wandb.log(logged)