rbtree test: fix sparse warning about 64-bit constant

Just a small fix to make sparse happy.
Signed-off-by: Michel Lespinasse <walken@google.com>
Reported-by: Fengguang Wu <wfg@linux.intel.com>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

lib/rbtree_test.c

@@ -88,7 +88,7 @@ static int rbtree_test_init(void)
 
 	printk(KERN_ALERT "rbtree testing");
 
-	prandom32_seed(&rnd, 3141592653589793238);
+	prandom32_seed(&rnd, 3141592653589793238ULL);
 	init();
 
 	time1 = get_cycles();