media: fix integer as NULL pointer warnings

drivers/media/video/v4l2-common.c:719:16: warning: Using plain integer as NULL pointer
drivers/media/video/au0828/au0828-dvb.c:122:19: warning: Using plain integer as NULL pointer
drivers/media/video/ivtv/ivtv-yuv.c:1101:22: warning: Using plain integer as NULL pointer
drivers/media/video/ivtv/ivtv-yuv.c:1102:23: warning: Using plain integer as NULL pointer
drivers/media/video/pvrusb2/pvrusb2-audio.c:78:39: warning: Using plain integer as NULL pointer
drivers/media/video/pvrusb2/pvrusb2-video-v4l.c:84:39: warning: Using plain integer as NULL pointer
drivers/media/video/pvrusb2/pvrusb2-v4l2.c:1264:9: warning: Using plain integer as NULL pointer
drivers/media/video/pvrusb2/pvrusb2-context.c:197:28: warning: Using plain integer as NULL pointer
drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c:126:39: warning: Using plain integer as NULL pointer
drivers/media/video/pvrusb2/pvrusb2-dvb.c:133:32: warning: Using plain integer as NULL pointer
drivers/media/video/pvrusb2/pvrusb2-dvb.c:145:31: warning: Using plain integer as NULL pointer
drivers/media/video/pvrusb2/pvrusb2-dvb.c:177:55: warning: Using plain integer as NULL pointer
drivers/media/video/videobuf-core.c:100:9: warning: Using plain integer as NULL pointer

Signed-off-by: Harvey Harrison <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/media/video/au0828/au0828-dvb.c

···
 		purb->transfer_buffer = kzalloc(URB_BUFSIZE, GFP_KERNEL);
 		if (!purb->transfer_buffer) {
 			usb_free_urb(purb);
-			dev->urbs[i] = 0;
+			dev->urbs[i] = NULL;
 			goto err;
 		}
 

drivers/media/video/ivtv/ivtv-yuv.c

···
 	ivtv_yuv_next_free(itv);
 
 	/* Copy V4L2 parameters to an ivtv_dma_frame struct... */
-	dma_args.y_source = 0L;
-	dma_args.uv_source = 0L;
+	dma_args.y_source = NULL;
+	dma_args.uv_source = NULL;
 	dma_args.src.left = 0;
 	dma_args.src.top = 0;
 	dma_args.src.width = yi->v4l2_src_w;

drivers/media/video/pvrusb2/pvrusb2-audio.c

···
 	pvr2_trace(PVR2_TRACE_CHIPS,"i2c msp3400 v4l2 set_stereo");
 
 	if ((sid < ARRAY_SIZE(routing_schemes)) &&
-	    ((sp = routing_schemes + sid) != 0) &&
+	    ((sp = routing_schemes + sid) != NULL) &&
 	    (hdw->input_val >= 0) &&
 	    (hdw->input_val < sp->cnt)) {
 		route.input = sp->def[hdw->input_val];

drivers/media/video/pvrusb2/pvrusb2-context.c

···
 int pvr2_context_global_init(void)
 {
 	pvr2_context_thread_ptr = kthread_run(pvr2_context_thread_func,
-					      0,
+					      NULL,
 					      "pvrusb2-context");
 	return (pvr2_context_thread_ptr ? 0 : -ENOMEM);
 }

drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c

···
 	memset(&route,0,sizeof(route));
 
 	if ((sid < ARRAY_SIZE(routing_schemes)) &&
-	    ((sp = routing_schemes + sid) != 0) &&
+	    ((sp = routing_schemes + sid) != NULL) &&
 	    (hdw->input_val >= 0) &&
 	    (hdw->input_val < sp->cnt)) {
 		vid_input = sp->def[hdw->input_val].vid;

drivers/media/video/pvrusb2/pvrusb2-dvb.c

···
 		for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
 			if (!(adap->buffer_storage[idx])) continue;
 			kfree(adap->buffer_storage[idx]);
-			adap->buffer_storage[idx] = 0;
+			adap->buffer_storage[idx] = NULL;
 		}
 		adap->stream_run = 0;
 	}
···
 	unsigned int idx;
 	int ret;
 	struct pvr2_buffer *bp;
-	struct pvr2_stream *stream = 0;
+	struct pvr2_stream *stream = NULL;
 
 	if (adap->stream_run) return -EIO;
 
···
 	ret = pvr2_hdw_set_streaming(adap->channel.hdw, 1);
 	if (ret < 0) return ret;
 
-	while ((bp = pvr2_stream_get_idle_buffer(stream)) != 0) {
+	while ((bp = pvr2_stream_get_idle_buffer(stream)) != NULL) {
 		ret = pvr2_buffer_queue(bp);
 		if (ret < 0) return ret;
 	}

drivers/media/video/pvrusb2/pvrusb2-v4l2.c

···
  fail:
 	pvr2_trace(PVR2_TRACE_STRUCT,"Failure creating pvr2_v4l2 id=%p",vp);
 	pvr2_v4l2_destroy_no_lock(vp);
-	return 0;
+	return NULL;
 }
 
 /*

drivers/media/video/pvrusb2/pvrusb2-video-v4l.c

···
 	pvr2_trace(PVR2_TRACE_CHIPS,"i2c v4l2 set_input(%d)",hdw->input_val);
 
 	if ((sid < ARRAY_SIZE(routing_schemes)) &&
-	    ((sp = routing_schemes + sid) != 0) &&
+	    ((sp = routing_schemes + sid) != NULL) &&
 	    (hdw->input_val >= 0) &&
 	    (hdw->input_val < sp->cnt)) {
 		route.input = sp->def[hdw->input_val];

drivers/media/video/v4l2-common.c

···
 	int err;
 
 	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
-	if (client == 0)
+	if (!client)
 		return -ENOMEM;
 
 	client->addr = address;

drivers/media/video/videobuf-core.c

···
 void *videobuf_queue_to_vmalloc (struct videobuf_queue *q,
 			   struct videobuf_buffer *buf)
 {
-	return CALL(q, vmalloc, buf);
+	if (q->int_ops->vmalloc)
+		return q->int_ops->vmalloc(buf);
+	else
+		return NULL;
 }
 EXPORT_SYMBOL_GPL(videobuf_queue_to_vmalloc);