pyln: fix msat float multiplication

contrib/pyln-client/pyln/client/lightning.py

@@ -177,7 +177,7 @@ class Millisatoshi:
         return Millisatoshi(int(self) - int(other))
 
     def __mul__(self, other: int) -> 'Millisatoshi':
-        return Millisatoshi(self.millisatoshis * other)
+        return Millisatoshi(int(self.millisatoshis * other))
 
     def __truediv__(self, other: Union[int, float]) -> 'Millisatoshi':
         return Millisatoshi(int(self.millisatoshis / other))

contrib/pyln-client/tests/test_units.py

@@ -93,7 +93,6 @@ def test_zero():
     assert int(amount) == 0
 
 
-@pytest.mark.xfail
 def test_round_zero():
     # everything below 1msat should round down to zero
     amount = Millisatoshi("1msat") * 0.9
@@ -151,7 +150,6 @@ def test_round_zero():
     assert int(amount) == 0
 
 
-@pytest.mark.xfail
 def test_round_down():
     # sub msat significatns should be floored
     amount = Millisatoshi("2msat") * 0.9