FIX: deal with case where special treatment returns None

src/caosadvancedtools/cfoods/h5.py

@@ -261,9 +261,11 @@ class H5CFood(AbstractFileCFood):
             if create_recordTypes and key.lower() not in ['description']:
                 treated_k, _, treated_dtype = special_treatment(
                     key, val, dtype)
-                prop = db.Property(name=treated_k, datatype=treated_dtype)
-                collection.append(prop)
-                rec.add_property(name=treated_k)
+
+                if treated_k is not None:
+                    prop = db.Property(name=treated_k, datatype=treated_dtype)
+                    collection.append(prop)
+                    rec.add_property(name=treated_k)
             else:
                 treated_k, treated_v, treated_dtype = special_treatment(
                     key, val, dtype)