Undo cleanup reversal

"Just pointing out that this bit is actually reversing a recent cleanup in Pillow. See commit 923018d and PR #474. I guess that cleanup was merged into Pillow after I did my merge from Pillow to PL’s fork."
https://github.com/python-imaging/Pillow/pull/618#discussion_r11559186

PIL/OleFileIO.py

@@ -1033,7 +1033,7 @@ class OleFileIO:
             if entry[1:2] == "Image":
                 fin = ole.openstream(entry)
                 fout = open(entry[0:1], "wb")
-                while 1:
+                while True:
                     s = fin.read(8192)
                     if not s:
                         break