Description of problem:
While Guest machine is shutting down a segmentation fault occurs.

Version-Release number of selected component (if applicable):
architecture: x86_64
cmdline: spicec -h localhost -p 3001
component: spice-client
crash_function: RedScreen::find_pointer_layer
executable: /usr/bin/spicec
kernel: 2.6.32-114.0.1.el6.x86_64
package: spice-client-0.7.3-1.el6
rating: 4
reason: Process /usr/bin/spicec was killed by signal 11 (SIGSEGV)
release: Red Hat Enterprise Linux Workstation release 6.1 Beta (Santiago)

How reproducible:
3/3

Steps to Reproduce:
1. Run VM using qemu-kvm (/usr/libexec/qemu-kvm -vga qxl -m 1024 -smp 2 -spice port=3001,disable-ticketing /dev/rootvm/RHEL61_x64_test, where RHEL61_x64_test is lv with installed RHEL6.1 guest)
2. Connect to the Guest with spicec (spicec -h localhost -p 3001)
3. Switch to the fullscreen mode with pressing Shift+F11.
4. Shutdown the Guest with using shutdown button.

  
Actual results:
Segmentation fault

Expected result:
spice disconnects gracefully (no error to the user) when the VM is shutdown.