fix nullpointerexcpetion on first login

scm-webapp/src/main/java/sonia/scm/user/xml/XmlUserDatabase.java

@@ -59,6 +59,20 @@ import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
 public class XmlUserDatabase
 {
 
+  /**
+   * Constructs ...
+   *
+   */
+  public XmlUserDatabase()
+  {
+    long c = System.currentTimeMillis();
+
+    creationTime = c;
+    lastModified = c;
+  }
+
+  //~--- methods --------------------------------------------------------------
+
   /**
    * Method description
    *

scm-webapp/src/main/java/sonia/scm/user/xml/XmlUserManager.java

@@ -242,7 +242,6 @@ public class XmlUserManager extends AbstractUserManager
     if (userDB == null)
     {
       userDB = new XmlUserDatabase();
-      userDB.setCreationTime(System.currentTimeMillis());
       createDefaultAccounts();
     }
   }