--- 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])