fixed a minor issue with the fps counter in the batching demo
fixed a minor issue with the fps counter in the batching demo

Aurioch/MonoGame.Extended,rafaelalmeidatk/MonoGame.Extended,HyperionMT/MonoGame.Extended,cra0zy/MonoGame.Extended,LithiumToast/MonoGame.Extended,rafaelalmeidatk/MonoGame.Extended