Apply review changes for _pyio _blkszie

Author: cmaloney

Lib/_pyio.py

@@ -1614,11 +1614,14 @@ def __repr__(self):
 
     @property
     def _blksize(self):
-        if self._stat_atopen:
-            res = getattr(self._stat_atopen, "st_blksize", 0)
-
-        # WASI sets blksize to 0
-        return res if res > 0 else DEFAULT_BUFFER_SIZE
+        if self._stat_atopen is None:
+            return DEFAULT_BUFFER_SIZE
+
+        blksize = getattr(self._stat_atopen, "st_blksize", 0)
+        # WASI sets blsize to 0
+        if not blksize:
+            return DEFAULT_BUFFER_SIZE
+        return blksize
 
     def _checkReadable(self):
         if not self._readable: