fix(Tinebase/WebDAV): skip 404 children

Change-Id: I5bde3d4371dffc6b8a4959c120e364cf3a577b01
Reviewed-on: http://gerrit.tine20.com/customers/16241
Reviewed-by: Philipp Schüle <p.schuele@metaways.de>
Tested-by: Jenkins CI (http://ci.tine20.com/) <tine20-jenkins@metaways.de>

tine20/Tinebase/Frontend/WebDAV/Container.php

@@ -207,8 +207,12 @@ public function getChildren()
 
         // Loop through the directory, and create objects for each node
         foreach (Tinebase_FileSystem::getInstance()->scanDir($this->_path) as $node) {
-            if (Tinebase_Core::getUser()->hasGrant($node, Tinebase_Model_Grants::GRANT_READ)) {
-                $children[] = $this->getChild($node->name);
+            try {
+                if (Tinebase_Core::getUser()->hasGrant($node, Tinebase_Model_Grants::GRANT_READ)) {
+                    $children[] = $this->getChild($node->name);
+                }
+            } catch (Tinebase_Exception_NotFound $tenf) {
+                // skip
             }
         }