staging: lustre: plain interger was used as NULL pointer
staging: lustre: plain interger was used as NULL pointer

This patch fixes the following warnings found when running sparse:
.../lproc_echo.c:43:11: warning: Using plain integer as NULL pointer
.../lproc_echo.c:49:11: warning: Using plain integer as NULL pointer

Signed-off-by: Josep Puigdemont <fe304fa8d06af7a00144778ee31bd6f5d5f8cde5@gmail.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

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