V4L/DVB: videobuf-dma-sg: Fix a warning due to the usage of min(PAGE_SIZE, arg)

drivers/media/video/videobuf-dma-sg.c: In function ‘videobuf_pages_to_sg’:
drivers/media/video/videobuf-dma-sg.c:119: warning: comparison of distinct pointer types lacks a cast
drivers/media/video/videobuf-dma-sg.c:120: warning: comparison of distinct pointer types lacks a cast

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/videobuf-dma-sg.c

@@ -116,8 +116,8 @@ static struct scatterlist *videobuf_pages_to_sg(struct page **pages,
 			goto nopage;
 		if (PageHighMem(pages[i]))
 			goto highmem;
-		sg_set_page(&sglist[i], pages[i], min(PAGE_SIZE, size), 0);
-		size -= min(PAGE_SIZE, size);
+		sg_set_page(&sglist[i], pages[i], min((unsigned)PAGE_SIZE, size), 0);
+		size -= min((unsigned)PAGE_SIZE, size);
 	}
 	return sglist;