JFS: Remove defconfig ptr comparison to 0

Remove sparse warning: Using plain integer as NULL pointer

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 2370716..325a967 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -2345,7 +2345,7 @@
 
 	do {
 		spin_lock_irq(&log_redrive_lock);
-		while ((bp = log_redrive_list) != 0) {
+		while ((bp = log_redrive_list)) {
 			log_redrive_list = bp->l_redrive_next;
 			bp->l_redrive_next = NULL;
 			spin_unlock_irq(&log_redrive_lock);