[Evolution] Sig11 in evolution-addressbook-factory w/WebDAV address book

[Adam Tauno Williams <awilliam whitemice org>]

I'm suddenly having by WebDAV addressbook crashing the
evolutions-addressbook-factory.  So I ran it by hand and grabbed a back
trace from the core dump.

Core was generated by
`/usr/lib/evolution-data-server/evolution-addressbook-factory -r -w'.
Program terminated with signal 11, Segmentation fault.
#0  upload_contact (webdav=webdav entry=0x2030840, 
    contact=contact entry=0x7f5ed8008010,
reason=reason entry=0x7f5ef1971d48)
    at e-book-backend-webdav.c:219
219             soup_message_headers_append (message->request_headers,
"User-Agent", USERAGENT);
(gdb) bt
#0  upload_contact (webdav=webdav entry=0x2030840,
contact=contact entry=
    0x7f5ed8008010, reason=reason entry=0x7f5ef1971d48)
    at e-book-backend-webdav.c:219
#1  0x00007f5ef87eb12d in e_book_backend_webdav_modify_contacts (
    backend=<optimized out>, book=0x200bdc0, opid=22, 
    cancellable=<optimized out>, vcards=0x7f5ee40afd90 = {...})
    at e-book-backend-webdav.c:494
#2  0x00007f5f022eca1f in ?? () from /usr/lib64/libedata-book-1.2.so.15
#3  0x00007f5f0192bb92 in g_thread_pool_thread_proxy ()
   from /usr/lib64/libglib-2.0.so.0
#4  0x00007f5f0192b375 in g_thread_proxy ()
from /usr/lib64/libglib-2.0.so.0
#5  0x00007f5f016a8e0e in start_thread () from /lib64/libpthread.so.0
#6  0x00007f5f013e02bd in clone () from /lib64/libc.so.6
(gdb) 

evolution-3.6.1-1.1.x86_64
evolution-data-server-3.6.1-1.4.x86_64
openSUSE 12.2 x86_64