jittor.nn.Upsample设定的默认值无法正常运行

[PhyllisJi]

Describe the bug

当使用Upsample的默认取值时，它会无法正常工作并报错
检查源代码发现，接口Upsample的其中一个参数被默认设置为None，但是None无法完成接口中的运算

Full Log

x = jittor.randn(3,32,32)
p = jittor.nn.Upsample()
y = p(x)
Traceback (most recent call last)
TypeError Cell In[5],Line 1
p(x)---->1y=_init__py:
,in Module.call(self,*args File \AppData\Local\Programs\Python\Python310\Lib\site-packages\jittor**kw)
def call(self, *args, **kw):->
return self.execute(*args,**kw)
File\AppData\Local\Programs\Python\Python310\Lib\site-packages\jittor\nn.py:2160,in Upsample.execute(self,x)
def execute(self,x):2158
return upsample(x,
size=(2159
int(x.shape [2]*self.scale_factor [0]),
int(x.shape[3]*self.scale_factor[1])
mode=self.mode)
TypeError:unsupported operand type(s)for *:'int'and 'NoneType'

Minimal Reproduce

x = jittor.randn(3, 3, 32, 32)
p = jittor.nn.Upsample()
y = p(x)

Expected behavior

Upsample正常工作

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