Changed _finish to bail if tpc_vote wasn't called or didn't do anything.

src/ZODB/FileStorage.py

@@ -184,7 +184,7 @@
 #   may have a back pointer to a version record or to a non-version
 #   record.
 #
-__version__='$Revision: 1.45 $'[11:-2]
+__version__='$Revision: 1.46 $'[11:-2]
 
 import struct, time, os, bpthread, string, base64, sys
 from struct import pack, unpack
@@ -762,6 +762,8 @@ class FileStorage(BaseStorage.BaseStorage):
         finally: self._lock_release()
  
     def _finish(self, tid, u, d, e):
+        nextpos=self._nextpos
+        if nextpos:
             file=self._file
 
             # Clear the checkpoint flag
@@ -771,7 +773,7 @@ class FileStorage(BaseStorage.BaseStorage):
 
             if fsync is not None: fsync(file.fileno())
 
-        self._pos=self._nextpos
+            self._pos=nextpos
 
             index=self._index
             for oid, pos in self._tindex: index[oid]=pos