Staging: emxx_udc: Return NULL instead of 0.

Return NULL instead of 0 from nbu2ss_ep_alloc_request(),if req pointer is NULL.

Signed-off-by: Sandhya Bankar <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/emxx_udc/emxx_udc.c

···
 
 	req = kzalloc(sizeof(*req), gfp_flags);
 	if (!req)
-		return 0;
+		return NULL;
 
 #ifdef USE_DMA
 	req->req.dma = DMA_ADDR_INVALID;