Merged revisions 43321 via svnmerge from

svn://svn.silverstripe.com/silverstripe/modules/cms/branches/2.1.0-rc3oriwave2

........
  r43321 | hsmith | 2007-10-11 17:50:49 +1300 (Thu, 11 Oct 2007) | 2 lines
  
  Added LeftAndMainSubsites->augmentNewSiteTreeItem that allows extensions of LeftAndMain to provide the current SubsiteID for the new item.
  CMSMain->getNewItem now calls $this->extend('augmentNewSiteTreeItem', $newItem);
........


git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/cms/trunk@49765 467b73ca-7a2a-4603-9d3b-597d59a354a9

code/CMSMain.php

@@ -450,6 +450,9 @@ public function getNewItem($id, $setID = true) {
 
 		if($setID) $newItem->ID = $id;
 
+		# Some modules like subsites add extra fields that need to be set when the new item is created
+		$this->extend('augmentNewSiteTreeItem', $newItem);
+
 		return $newItem;
 	}