doc webdav: fix "improvement" that totally broke WebDAV

I had long warned against that kind of "improvements".

bzr revid: p_christ@hol.gr-20101230095405-61ooshitgoo4ysjw

addons/document_webdav/dav_fs.py

@@ -374,7 +374,7 @@ class openerp_dav_handler(dav_interface):
                     cr.close()
         return self.db_name_list
 
-    def get_children(self,uri, filters=None):
+    def get_childs(self,uri, filters=None):
         """ return the child objects as self.baseuris for the given URI """
         self.parent.log_message('get children: %s' % uri)
         cr, uid, pool, dbname, uri2 = self.get_cr(uri, allow_last=True)