Comment 11 for bug 1208473

To reproduce:
- Run xorg-server in valgrind to slow it down enough.
- Hammer on the touchpad like a madman.
- ssh in and chvt away while hammering.
- Observe the following crash in X.org:

[ 2444.985] (EE) BUG: triggered 'if (!dev->spriteInfo->sprite)'
[ 2444.987] (EE) BUG: ../../mi/mieq.c:497 in mieqMoveToNewScreen()
[ 2444.989] (EE)
[ 2444.991] (EE) Backtrace:
[ 2445.012] (EE) 0: /usr/bin/Xorg (mieqProcessDeviceEvent+0x114) [0x2932b4]
[ 2445.019] (EE) 1: /usr/bin/Xorg (mieqProcessInputEvents+0xf7) [0x293447]
[ 2445.027] (EE) 2: /usr/bin/Xorg (ProcessInputEvents+0x9) [0x19b159]
[ 2445.037] (EE) 3: /usr/bin/Xorg (xf86VTSwitch+0x365) [0x19ba75]
[ 2445.046] (EE) 4: /usr/bin/Xorg (WakeupHandler+0x6d) [0x1625ad]
[ 2445.056] (EE) 5: /usr/bin/Xorg (WaitForSomething+0x1bf) [0x2ae48f]
[ 2445.065] (EE) 6: /usr/bin/Xorg (SendErrorToClient+0xe1) [0x15d9d1]
[ 2445.073] (EE) 7: /usr/bin/Xorg (remove_fs_handlers+0x40a) [0x161afa]
[ 2445.079] (EE) 8: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x6f6dec5]
[ 2445.088] (EE) 9: /usr/bin/Xorg (_start+0x29) [0x14cfee]
[ 2445.093] (EE) 10: ? (?+0x29) [0x29]
[ 2445.094] (EE)