Fix NPEs when handling referenced milestones that do not exist

James Moger

2014-09-04 270e9e762820833d6815e362034dc3f4809b6470

 src/main/java/com/gitblit/auth/PAMAuthProvider.java

@@ -98,7 +98,9 @@
         logger.error(e.getMessage());
         return null;
      } finally {
         pam.dispose();
         if (pam != null) {
            pam.dispose();
         }
      }

        UserModel user = userManager.getUserModel(username);