[property] Add Value 0 as Int

Allow value = 0 set as int, not as empty value.
Fixing issue #314.

Author: fschrader1992

odml/property.py

@@ -82,7 +82,7 @@ def __init__(self, name=None, values=None, parent=None, unit=None,
 
         self._values = []
         self.values = values
-        if not values and (value or isinstance(value, bool)):
+        if not values and (value or isinstance(value, bool) or isinstance(value, int)):
             self.values = value
 
         self.parent = parent

test/test_property.py

@@ -183,6 +183,10 @@ def test_value_append(self):
         self.assertEqual(len(p5), 2)
         self.assertRaises(ValueError, p5.append, "[a, b, c]")
 
+        p6 = Property('myprop', value=0, dtype=DType.int)
+        self.assertEqual(p6.value, [0])
+        self.assertEqual(p6.values, [0])
+
     def test_value_extend(self):
         prop = Property(name="extend")