minimize not cleaning up broken binding sigs

[Peter Palfrader]

I notice that gpg (1.4.6-svn4217) does only clean signatures from UIDs, not
from subkeys:

| Command> minimize
| User ID "Peter Palfrader": 605 signatures removed
| [..]
| 
| weasel at asteria:~/tmp/g$ gpg --list-sigs
| ./pubring.gpg
| -------------
| pub   1024D/94C09C7F 1999-11-10
| uid                  Peter Palfrader
| sig 3    N   94C09C7F 2006-08-03  Peter Palfrader
[..]
| uid                  [jpeg image of size 7974]
| sig 3    N   94C09C7F 2006-08-03  Peter Palfrader
| sub   1024D/AFA44BDD 2003-07-09 [expires: 2008-08-02]
| sig          94C00910 2005-06-05  [User ID not found]
| sig          94C09C7F 2006-08-03  Peter Palfrader
| sub   2048g/E8F4A328 2003-07-09 [expires: 2008-08-02]
| sig          94C00910 2005-06-05  [User ID not found]
| sig          94C00910 2005-06-05  [User ID not found]
| sig          94C09C7F 2006-08-03  Peter Palfrader

Should it clean those broken binding sigs by '94C00910' too?

Cheers,
Peter
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