net: make struct inet_frags::qsize unsigned

This field is sizeof of corresponding kmem_cache so it can't be negative.

Prepare for 32-bit kmem_cache_create().
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/inet_frag.h

@@ -92,7 +92,7 @@ struct inet_frags {
 	 */
 	u32			rnd;
 	seqlock_t		rnd_seqlock;
-	int			qsize;
+	unsigned int		qsize;
 
 	unsigned int		(*hashfn)(const struct inet_frag_queue *);
 	bool			(*match)(const struct inet_frag_queue *q,