I'm trashing your mailbox, but 
http://bugs.python.org/file20949/issue11351-2.patch should do 
'total+=blen' not 'total+=len'.
Anyway i attach yet a third patch which does some code cleanup in 
general and is a bit more of my very own coding style, because 
i have seen that gotos seem to be possible in Python, and because 
i was unable to enjoy the code (and this is beautiful C!) before. 
It also follows PEP guidelines more than before.

This compiles clean and runs the test even if i
    hg revert && hg patch
(I'm a bit messy)