ccid-card-emul: do not crash if backend is not provided
commitd0ebd78890fba2ab458ec34763dae8566ccb1b72
authorMarc-André Lureau <mlureau@redhat.com>
Wed, 21 Nov 2012 13:16:08 +0000 (21 14:16 +0100)
committerAlon Levy <alevy@redhat.com>
Wed, 24 Apr 2013 08:47:32 +0000 (24 11:47 +0300)
tree03dafe97706309f9296ea93d418173f8a545f587
parente2fd2115ce26049335d66ae0ae5e5c0ad06fb498
ccid-card-emul: do not crash if backend is not provided

Program received signal SIGSEGV, Segmentation fault.
__strcmp_sse42 () at ../sysdeps/x86_64/multiarch/strcmp-sse42.S:164
164               movdqu        (%rsi), %xmm2
(gdb) bt
    at /home/elmarco/320g/src/qemu/hw/ccid-card-emulated.c:477
    at /home/elmarco/320g/src/qemu/hw/ccid-card-emulated.c:503

Signed-off-by: Marc-André Lureau <mlureau@redhat.com>
Reviewed-by: Alon Levy <alevy@redhat.com>
hw/usb/ccid-card-emulated.c