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_mount.c b/fs/jfs/jfs_mount.c
index 644429a..7b698f2 100644
--- a/fs/jfs/jfs_mount.c
+++ b/fs/jfs/jfs_mount.c
@@ -147,7 +147,7 @@
 	 */
 	if ((sbi->mntflag & JFS_BAD_SAIT) == 0) {
 		ipaimap2 = diReadSpecial(sb, AGGREGATE_I, 1);
-		if (ipaimap2 == 0) {
+		if (!ipaimap2) {
 			jfs_err("jfs_mount: Faild to read AGGREGATE_I");
 			rc = -EIO;
 			goto errout35;