Caldav: Fix 3569934 NullPointerException on broken PROPFIND request

git-svn-id: http://svn.code.sf.net/p/davmail/code/trunk@2028 3d1905a2-6b24-0410-a738-b14d5a86fcbd

src/java/davmail/caldav/CaldavConnection.java

@@ -1480,6 +1480,9 @@ public class CaldavConnection extends AbstractConnection {
         }
 
         protected void parseXmlBody() throws IOException {
+            if (body == null) {
+                throw new DavMailException("EXCEPTION_INVALID_CALDAV_REQUEST", "Missing body");
+            }
             XMLStreamReader streamReader = null;
             try {
                 streamReader = XMLStreamUtil.createXMLStreamReader(body);