[Pyrex] Segfaults and leaked exceptions in 0.9.9

[Claudio Freire]

This is interestingly new (I think this didn't happen in 0.9.8, but I
didn't check)

test.pyx:

. def fault():
.     try:
.         return {}[3]
.     except:
.         return None
.
. def bork():
.     cdef object rv
.     try:
.         rv = {}[3]
.     except:
.         rv = None
.     return rv

test session:

Python 2.7.3 (default, Apr 14 2012, 08:58:41) [GCC] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import lrucache
>>> lrucache.bork()
>>> 3
KeyError: 3
>>> lrucache.fault()
Segmentation fault