CODE: genetic_value

The `genetic_value` function will produce an error when the `trait_id` column is created by numpy (i.e., np.zeros()), as it is read as a float object.

tstrait/genetic_value.py

@@ -102,7 +102,7 @@ def _run(self):
         """
 
         num_ind = self.ts.num_individuals
-        num_trait = np.max(self.trait_df.trait_id) + 1
+        num_trait = int(np.max(self.trait_df.trait_id)) + 1
         genetic_val_array = np.zeros((num_trait, num_ind))
         tree = tskit.Tree(self.ts)