[python] fix 2 backtrace issues

[Tom Tromey <tromey@redhat.com>]

I'm checking this in on the python branch.

This fixes two problems.  First, PR 12119, where multiple filters failed
because we didn't capture the global's value in the lambda.  Second, a
tab in backtrace.py.

Tom

diff --git a/gdb/python/lib/gdb/backtrace.py b/gdb/python/lib/gdb/backtrace.py
index 2baab5f..6bb4fb1 100644
--- a/gdb/python/lib/gdb/backtrace.py
+++ b/gdb/python/lib/gdb/backtrace.py
@@ -1,6 +1,6 @@
 # Filtering backtrace.
 
-# Copyright (C) 2008 Free Software Foundation, Inc.
+# Copyright (C) 2008, 2011 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -32,7 +32,7 @@ an iterator returning such objects."""
     if frame_filter == None:
         frame_filter = constructor
     else:
-        frame_filter = lambda iterator: constructor (frame_filter (iterator))
+        frame_filter = lambda iterator, filter = frame_filter: constructor (filter (iterator))
 
 def create_frame_filter (iter):
     global frame_filter
diff --git a/gdb/python/lib/gdb/command/backtrace.py b/gdb/python/lib/gdb/command/backtrace.py
index ec9a527..2aa5b90 100644
--- a/gdb/python/lib/gdb/command/backtrace.py
+++ b/gdb/python/lib/gdb/command/backtrace.py
@@ -1,6 +1,6 @@
 # New backtrace command.
 
-# Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+# Copyright (C) 2008, 2009, 2011 Free Software Foundation, Inc.
 
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -80,7 +80,7 @@ Use of the 'raw' qualifier avoids any filtering by loadable modules.
 
         # FIXME: provide option to start at selected frame
         # However, should still number as if starting from newest
-	newest_frame = gdb.selected_thread ().newest_frame ()
+        newest_frame = gdb.selected_thread ().newest_frame ()
         iter = itertools.imap (FrameWrapper,
                                FrameIterator (newest_frame))
         if filter: