# HG changeset patch
# User Matt Mackall <mpm@selenic.com>
# Date 1120810074 28800
# Node ID 08b65d66f3e77669a6619a7e66a66729fb4d9c9c
# Parent  2c934c7b79dc2d9ec638c7159eccbb3f24c6a4c4
Fix an odd revlog bug

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Fix an odd revlog bug

If revlog had a cached -empty- revision, as opposed to no cached
version, it could get confused. This cropped up in verify on a
particular repo.

manifest hash: 90ccf122087f6bbcb4322cb9d9bb8124610ba886
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diff -r 2c934c7b79dc -r 08b65d66f3e7 mercurial/revlog.py
--- a/mercurial/revlog.py	Fri Jul 08 00:04:25 2005 -0800
+++ b/mercurial/revlog.py	Fri Jul 08 00:07:54 2005 -0800
@@ -248,7 +248,7 @@
         f.seek(start)
         data = f.read(end - start)
 
-        if not text:
+        if text is None:
             last = self.length(base)
             text = decompress(data[:last])