bcache: Sparse fixes

Signed-off-by: Kent Overstreet <koverstreet@google.com>
diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index 732234d..24a5a2f 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -82,7 +82,7 @@
 {
 	struct keyprint_hack r;
 
-	snprintf(r.s, 40, "%li level %i/%i", PTR_BUCKET_NR(b->c, &b->key, 0),
+	snprintf(r.s, 40, "%zu level %i/%i", PTR_BUCKET_NR(b->c, &b->key, 0),
 		 b->level, b->c->root ? b->c->root->level : -1);
 	return r;
 }