staging: android: fix coding style checks in sw_sync.c
staging: android: fix coding style checks in sw_sync.c

replace comparison "obj" to NULL with "!obj"

Signed-off-by: Trung Thanh Le <9faf235008738eda97757863b52c60cafe1b151d@yahoo.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

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