Added a 'first' member to the imap_fetch_all_t struct so we can use that

Added a 'first' member to the imap_fetch_all_t struct so we can use that

2004-06-16  Jeffrey Stedfast  <fejj@ximian.com>

	* providers/imap4/camel-imap4-summary.c: Added a 'first' member to
	the imap_fetch_all_t struct so we can use that as a base offset in
	our GPtrArray, allowing us to limit resource consumption which
	could otherwise get quite large. Also added a ChangeInfo member
	that was needed for changes to untagged_fetch_all().
	(imap4_fetch_all_add): Use fetch->first as a base offset and
	change int i to guint32 i. Also updated to sue the fetch->changes.
	(imap4_fetch_all_update): Same.
	(untagged_fetch_all): Same - this is where it is really valuable,
	since we can avoid adding elements to the GPtrArray that we won't
	even use. Also needed to change code a big in case index <
	fetch->first (which could happen if a server notified us of a
	FLAGS change for a message we didn't request info about).
	(imap4_fetch_all_free): Free the ChangeInfo.
	(imap4_summary_fetch_all): Init fetch->changes and fetch->first.
	(imap4_summary_fetch_flags): Same.
	(camel_imap4_summary_flush_updates): Only request envelope info if
	first <= summary->exists. Avoids needless queries.
	(info_uid_sort): #if 0'd
	(camel_imap4_summary_flush_updates): No need to sort the summary -
	this should never have been needed. I can't remember why I did
	this...