Fixes threading issue.

FindInterceptorFix.cs

public CompoundInterceptor FindInterceptor(Type type)
{
    CompoundInterceptor interceptor;
    if (!_analyzedInterceptors.TryGetValue(type, out interceptor))
    {
      lock (_locker)
      {
        if (!_analyzedInterceptors.TryGetValue(type, out interceptor))
        {
           TypeInterceptor[] interceptorArray = _interceptors.FindAll(i => i.MatchesType(type)).ToArray();
           interceptor = new CompoundInterceptor(interceptorArray);
           _analyzedInterceptors.Add(type, interceptor);
        }
      }
   }
   return interceptor;
}