[livedet-iris-2020] Fix category type in view

advanced/databases/livedet_iris_2020/1.py

@@ -37,4 +37,4 @@ class Test(View):
         elif output == "label":
             return {"value": bool(obj.label)}
         elif output == "category":
-            return {"value": int(obj.category)}
+            return {"value": np.cast["int32"](obj.category)}