Add nullable_negative_or_zero_int.py

Author: n1nj4t4nuk1

pyvalueobjects/numbers/nullable_negative_or_zero_int.py

@@ -0,0 +1,10 @@
+from pyvalueobjects.abstract.nullablevalueobject import build_nullable
+from pyvalueobjects.numbers.negative_or_zero_int import NegativeOrZeroInt
+
+_nullable_cls = build_nullable(NegativeOrZeroInt)
+
+
+class NullableNegativeOrZeroInt(_nullable_cls):
+
+    def __init__(self, value: int = None):
+        super().__init__(value)