Hello,

this patch can be used to achieve a workaround to bug
http://sourceware.org/bugzilla/show_bug.cgi?id=14363
Besides being a workaround, it also is a new feature, enabling a 
pretty-printer to
control the pretty-printing on deeper recursion levels.

The bug:
Structures/classes which produce cyclic reference lead to an infinite 
recursion on
iterating children during pretty-pretting - leading to endless print and 
stack-overflow on gdb print.

What the patch does:
Before calling the pretty-printer, py-prettyprint.c:print_children() 
informs the pretty-printer about the current recursion level.
This is done by setting a property "level" if this property exists.

Changelog:

2012-08-02  Oliver Buchtala <oliver.buchtala@googlemail.com>

     python/py-prettyprint.c: provide current recursion level to pretty 
printer.