10 files changed, 3 insertions, 3 deletions
diff --git a/3rdparty/Sabre/DAV/Property/GetLastModified.php b/3rdparty/Sabre/DAV/Property/GetLastModified.php
index bd63f573140..bd63f573140 100755..100644
--- a/3rdparty/Sabre/DAV/Property/GetLastModified.php
+++ b/3rdparty/Sabre/DAV/Property/GetLastModified.php
diff --git a/3rdparty/Sabre/DAV/Property/Href.php b/3rdparty/Sabre/DAV/Property/Href.php
index dac564f24d7..cd1d867f71b 100755..100644
--- a/3rdparty/Sabre/DAV/Property/Href.php
+++ b/3rdparty/Sabre/DAV/Property/Href.php
@@ -82,7 +82,7 @@ class Sabre_DAV_Property_Href extends Sabre_DAV_Property implements Sabre_DAV_Pr
      */
     static function unserialize(DOMElement $dom) {
 
-        if (Sabre_DAV_XMLUtil::toClarkNotation($dom->firstChild)==='{DAV:}href') {
+        if ($dom->firstChild && Sabre_DAV_XMLUtil::toClarkNotation($dom->firstChild)==='{DAV:}href') {
             return new self($dom->firstChild->textContent,false);
         }
 
diff --git a/3rdparty/Sabre/DAV/Property/HrefList.php b/3rdparty/Sabre/DAV/Property/HrefList.php
index 7a52272e885..282c452ca0b 100755..100644
--- a/3rdparty/Sabre/DAV/Property/HrefList.php
+++ b/3rdparty/Sabre/DAV/Property/HrefList.php
@@ -79,7 +79,7 @@ class Sabre_DAV_Property_HrefList extends Sabre_DAV_Property {
      * It will only decode {DAV:}href values.
      *
      * @param DOMElement $dom
-     * @return Sabre_DAV_Property_Href
+     * @return Sabre_DAV_Property_HrefList
      */
     static function unserialize(DOMElement $dom) {
 
diff --git a/3rdparty/Sabre/DAV/Property/IHref.php b/3rdparty/Sabre/DAV/Property/IHref.php
index 5c0409064cb..5c0409064cb 100755..100644
--- a/3rdparty/Sabre/DAV/Property/IHref.php
+++ b/3rdparty/Sabre/DAV/Property/IHref.php
diff --git a/3rdparty/Sabre/DAV/Property/LockDiscovery.php b/3rdparty/Sabre/DAV/Property/LockDiscovery.php
index 2ded5649a44..2ded5649a44 100755..100644
--- a/3rdparty/Sabre/DAV/Property/LockDiscovery.php
+++ b/3rdparty/Sabre/DAV/Property/LockDiscovery.php
diff --git a/3rdparty/Sabre/DAV/Property/ResourceType.php b/3rdparty/Sabre/DAV/Property/ResourceType.php
index f6269611e54..f6269611e54 100755..100644
--- a/3rdparty/Sabre/DAV/Property/ResourceType.php
+++ b/3rdparty/Sabre/DAV/Property/ResourceType.php
diff --git a/3rdparty/Sabre/DAV/Property/Response.php b/3rdparty/Sabre/DAV/Property/Response.php
index 88afbcfb26d..9f21163d12e 100755..100644
--- a/3rdparty/Sabre/DAV/Property/Response.php
+++ b/3rdparty/Sabre/DAV/Property/Response.php
@@ -138,7 +138,7 @@ class Sabre_DAV_Property_Response extends Sabre_DAV_Property implements Sabre_DA
                 if (is_scalar($propertyValue)) {
                     $text = $document->createTextNode($propertyValue);
                     $currentProperty->appendChild($text);
-                } elseif ($propertyValue instanceof Sabre_DAV_Property) {
+                } elseif ($propertyValue instanceof Sabre_DAV_PropertyInterface) {
                     $propertyValue->serialize($server,$currentProperty);
                 } elseif (!is_null($propertyValue)) {
                     throw new Sabre_DAV_Exception('Unknown property value type: ' . gettype($propertyValue) . ' for property: ' . $propertyName);
diff --git a/3rdparty/Sabre/DAV/Property/ResponseList.php b/3rdparty/Sabre/DAV/Property/ResponseList.php
index cae923afbf9..cae923afbf9 100755..100644
--- a/3rdparty/Sabre/DAV/Property/ResponseList.php
+++ b/3rdparty/Sabre/DAV/Property/ResponseList.php
diff --git a/3rdparty/Sabre/DAV/Property/SupportedLock.php b/3rdparty/Sabre/DAV/Property/SupportedLock.php
index 4e3aaf23a1a..4e3aaf23a1a 100755..100644
--- a/3rdparty/Sabre/DAV/Property/SupportedLock.php
+++ b/3rdparty/Sabre/DAV/Property/SupportedLock.php
diff --git a/3rdparty/Sabre/DAV/Property/SupportedReportSet.php b/3rdparty/Sabre/DAV/Property/SupportedReportSet.php
index e62699f3b5a..e62699f3b5a 100755..100644
--- a/3rdparty/Sabre/DAV/Property/SupportedReportSet.php
+++ b/3rdparty/Sabre/DAV/Property/SupportedReportSet.php