[PATCH] fix possible NULL pointer in fs/ext3/super.c.

From: "Luiz Fernando N. Capitulino" <lcapitulino@prefeitura.sp.gov.br>

In fs/ext3/super.c::ext3_get_journal() at line 1675 `journal' can be NULL,
but it is not handled right (detect by Coverity's checker).

Signed-off by: Luiz Capitulino <lcapitulino@prefeitura.sp.gov.br>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/ext3/super.c

@@ -1643,6 +1643,7 @@ static journal_t *ext3_get_journal(struct super_block *sb, int journal_inum)
 	if (!journal) {
 		printk(KERN_ERR "EXT3-fs: Could not load journal inode\n");
 		iput(journal_inode);
+		return NULL;
 	}
 	journal->j_private = sb;
 	ext3_init_journal_params(EXT3_SB(sb), journal);