befs: fix leak

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 33baf27..34ddda8 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -873,6 +873,7 @@
 	brelse(bh);
 
       unacquire_priv_sbp:
+	kfree(befs_sb->mount_opts.iocharset);
 	kfree(sb->s_fs_info);
 
       unacquire_none: