Fix build on Python 2.4.

Spotted by:	kris

databases/zodb/files/patch-BTrees::convert.py

@@ -0,0 +1,16 @@
+--- BTrees/convert.py.orig	Fri Dec  3 01:25:34 2004
++++ BTrees/convert.py	Fri Dec  3 01:26:15 2004
+@@ -13,11 +13,11 @@
+ ##############################################################################
+ 
+ 
+-def convert(old, new, threshold=200, f=None, None=None):
++def convert(old, new, threshold=200, f=None, _None=None):
+     "Utility for converting old btree to new"
+     n=0
+     for k, v in old.items():
+-        if f is not None: v=f(v)
++        if f is not _None: v=f(v)
+         new[k]=v
+         n=n+1
+         if n > threshold:

databases/zodb/files/patch-ZEO::StorageServer.py

@@ -0,0 +1,20 @@
+--- ZEO/StorageServer.py.orig	Fri Dec  3 01:27:05 2004
++++ ZEO/StorageServer.py	Fri Dec  3 01:27:22 2004
+@@ -268,7 +268,7 @@
+ 
+     def message_input(self, message,
+                       dump=dump, Unpickler=Unpickler, StringIO=StringIO,
+-                      None=None):
++                      _None=None):
+         if __debug__:
+             if len(message) > max_blather:
+                 tmp = `message[:max_blather]`
+@@ -276,7 +276,7 @@
+                 tmp = `message`
+             blather('message_input', id(self), tmp)
+ 
+-        if self.__storage is None:
++        if self.__storage is _None:
+             # This is the first communication from the client
+             self.__storage, self.__storage_id = (
+                 self.__server.register_connection(self, message))

databases/zodb/files/patch-ZODB::ConflictResolution.py

@@ -0,0 +1,17 @@
+--- ZODB/ConflictResolution.py.orig	Fri Dec  3 01:28:07 2004
++++ ZODB/ConflictResolution.py	Fri Dec  3 01:28:26 2004
+@@ -56,12 +56,12 @@
+     data=None
+     
+     def __call__(self, oid,
+-                 getattr=getattr, None=None):
++                 getattr=getattr, _None=None):
+ 
+         data=self.data
+         if not data: data=self.data={}
+ 
+-        r=data.get(oid, None)
++        r=data.get(oid, _None)
+         if r is None:
+             r=PersistentReference()
+             r.data=oid

databases/zodb/files/patch-ZODB::Transaction.py

@@ -0,0 +1,14 @@
+--- ZODB/Transaction.py.orig	Fri Dec  3 01:29:04 2004
++++ ZODB/Transaction.py	Fri Dec  3 01:29:17 2004
+@@ -351,9 +351,9 @@
+ 
+ else:
+     _t={}
+-    def get_transaction(_id=thread.get_ident, _t=_t, get=_t.get, None=None):
++    def get_transaction(_id=thread.get_ident, _t=_t, get=_t.get, _None=None):
+         id=_id()
+-        t=get(id, None)
++        t=get(id, _None)
+         if t is None: _t[id]=t=Transaction(id)
+         return t
+ 

databases/zodb/files/patch-ZODB::referencesf.py

@@ -0,0 +1,14 @@
+--- ZODB/referencesf.py.orig	Fri Dec  3 01:29:52 2004
++++ ZODB/referencesf.py	Fri Dec  3 01:30:06 2004
+@@ -19,9 +19,9 @@
+                 Unpickler=cPickle.Unpickler,
+                 StringIO=cStringIO.StringIO,
+                 tt=type(()),
+-                type=type, None=None):
++                type=type, _None=None):
+ 
+-    if rootl is None: rootl=[]
++    if rootl is _None: rootl=[]
+     u=Unpickler(StringIO(p))
+     l=len(rootl)
+     u.persistent_load=rootl