befs: fix leak

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/befs/linuxvfs.c

@@ -873,6 +873,7 @@ befs_fill_super(struct super_block *sb, void *data, int silent)
 	brelse(bh);
 
       unacquire_priv_sbp:
+	kfree(befs_sb->mount_opts.iocharset);
 	kfree(sb->s_fs_info);
 
       unacquire_none: