Staging: speakup: Fix sparse warning in varhandlers.c
Staging: speakup: Fix sparse warning in varhandlers.c

'cp' is a pointer. Fix the incorrect comparison with integer to
avoid the below warning:
drivers/staging/speakup/varhandlers.c:283:19: warning:
Using plain integer as NULL pointer

Signed-off-by: Sachin Kamat <1c3b1584a6008857f36c03c58f657c0fc16fc09e@linaro.org>
Acked-by: Samuel Thibault <49a5ed162141aa1a2ad45c2f70540ac844521912@ens-lyon.org>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs