* camel-folder.c (camel_folder_search_by_expression): Make this
	return a GPtrArray rather than a GList.

	* camel-folder-search.c (camel_folder_search_execute_expression):
	* providers/imap/camel-imap-folder.c (imap_search_by_expression):
	* providers/mbox/camel-mbox-folder.c (mbox_search_by_expression):
	* providers/nntp/camel-nntp-folder.c (nntp_search_by_expression):
	Update to return a GPtrArray rather than a GList.

svn path=/trunk/; revision=3958