Fixed log_norm_score handling of None

sciunit/scores/base.py

@@ -95,19 +95,19 @@ def norm_score(self):
     def log_norm_score(self):
         """The natural logarithm of the `norm_score`.
         This is useful for guaranteeing convexity in an error surface"""
-        return np.log(self.norm_score)
+        return np.log(s.norm_score) if s.norm_score is not None else None
 
     @property
     def log2_norm_score(self):
         """The logarithm base 2 of the `norm_score`.
         This is useful for guaranteeing convexity in an error surface"""
-        return np.log2(self.score)
+        return np.log2(s.norm_score) if s.norm_score is not None else None
 
     @property
     def log10_norm_score(self):
         """The logarithm base 10 of the `norm_score`.
         This is useful for guaranteeing convexity in an error surface"""
-        return np.log10(self.score)
+        return np.log10(s.norm_score) if s.norm_score is not None else None
 
     def color(self, value=None):
         """Turn the score intp an RGB color tuple of three 8-bit integers."""