Only store major version of AddIn in VS project file

visual_studio/NativeClientVSAddIn/NativeClientVSAddIn/Utility.cs

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 namespace NativeClientVSAddIn
 {
   using System;
   using System.Collections.Generic;
 
   using EnvDTE;
   using EnvDTE80;
   using Microsoft.VisualStudio.VCProjectEngine;
 
   /// <summary>
   /// Contains helper functions for this add-in.
   /// </summary>
   public static class Utility
   {
     /// <summary>
     /// Tells us if the given project is a Visual C/C++ project.
     /// </summary>
     /// <param name="proj">Project to check.</param>
     /// <returns>True if project is a Visual C/C++ project.</returns>
     public static bool IsVisualCProject(Project proj)
     {
+      if (proj.Properties == null)
+      {
+        return false;
+      }
       foreach (Property prop in proj.Properties)
       {
         if (prop.Name == "Kind")
         {
           string projectType = prop.Value as string;
           return projectType == "VCProject";
         }
       }
 
       return false;
@@ skipping 175 matching lines @@
               proc.ParentID,
               anscestor,
               proc.CreationDate);
         }
       }
 
       return false;
     }
   }
 }