udf: Deletion of unnecessary checks before the function call "iput"

The iput() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/udf/super.c

@@ -2237,7 +2237,6 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
 	return 0;
 
 error_out:
-	if (sbi->s_vat_inode)
 	iput(sbi->s_vat_inode);
 #ifdef CONFIG_UDF_NLS
 	if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
@@ -2291,7 +2290,6 @@ static void udf_put_super(struct super_block *sb)
 
 	sbi = UDF_SB(sb);
 
-	if (sbi->s_vat_inode)
 	iput(sbi->s_vat_inode);
 #ifdef CONFIG_UDF_NLS
 	if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))