python - be: Fix some cache leaks, at best, or crashes, at worst.

Log Message:
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Fix some cache leaks, at best, or crashes, at worst.

Make auto's whose values are set after the setjmp volatile so that those values
can actually be referenced. On my system, a cache leak was occurring in one of
these cases, but I imagine that other systems might not be so forgiving.

Modified Files:
--------------
be/src:
function.c (r1.23 -> r1.24)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/function.c.diff?r1=1.23&r2=1.24)
heaptuple.c (r1.16 -> r1.17)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/heaptuple.c.diff?r1=1.16&r2=1.17)
pl.c (r1.40 -> r1.41)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/pl.c.diff?r1=1.40&r2=1.41)
tupledesc.c (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/tupledesc.c.diff?r1=1.15&r2=1.16)
type.c (r1.22 -> r1.23)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type.c.diff?r1=1.22&r2=1.23)
be/src/call:
portal.c (r1.13 -> r1.14)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/call/portal.c.diff?r1=1.13&r2=1.14)
be/src/type:
object.c (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/type/object.c.diff?r1=1.8&r2=1.9)