Fix example count display. (#218)
Fix example count display. (#218)

The pacman play demo (`webcam-transfer-learning/`) displays captured training data examples for each control (Up/Down/Left/Right).
The display show one less than real number of examples.
tensorflow/tfjs-examples,tensorflow/tfjs-examples,tensorflow/tfjs-examples,tensorflow/tfjs-examples,tensorflow/tfjs-examples,tensorflow/tfjs-examples,tensorflow/tfjs-examples