Need to ref the CamelMessageInfo after adding to the summary because

Need to ref the CamelMessageInfo after adding to the summary because

2008-05-11  Jeffrey Stedfast  <fejj@novell.com>

	* camel-imap4-summary.c (imap4_fetch_all_add): Need to ref the
	CamelMessageInfo after adding to the summary because
	camel_folder_summary_add() does not ref.

	* camel-imap4-store.c: Define some symbols that might not exist in
	the version of camel we are linking against.
	(imap4_build_folder_info_tree): New function to build a tree
	structure of CamelFolderInfo's from an array.

svn path=/trunk/; revision=8781