typing fix

Author: blueyed

src/_pytest/capture.py

@@ -689,11 +689,10 @@ def writeorg(self, data):
 class TeeSysCapture(SysCapture):
     def __init__(self, fd: int) -> None:
         old = getattr(sys, patchsysdict[fd])
-        if fd != 0:
-            tmpfile = PassthroughCaptureIO(old)
+        if fd == 0:
+            super().__init__(fd)
         else:
-            tmpfile = None
-        super().__init__(fd, tmpfile)
+            super().__init__(fd, PassthroughCaptureIO(old))
         assert self._old == old, (self._old, old)