[MERGE] Stop passing specific_file lists to show_tree_status

[Robert Collins]

This fixes a performance regression in 'bzr status .' and similar
invocations.

specific path processing is much more expensive than full-tree
processing, when the same set of paths is being considered, so we should
not pass in specific_files except when there are actually interesting
files :)

-Rob
-- 
GPG key available at: <http://www.robertcollins.net/keys.txt>.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: status-3637.patch
Type: text/x-patch
Size: 9164 bytes
Desc: not available
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20080817/739e4516/attachment.bin 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
Url : https://lists.ubuntu.com/archives/bazaar/attachments/20080817/739e4516/attachment.pgp