Fix missing call to show() in example.

Author: dopplershift

examples/animation/bayes_update.py

@@ -44,3 +44,4 @@ def __call__(self, i):
 ud = UpdateDist(ax, prob=0.7)
 anim = FuncAnimation(fig, ud, frames=np.arange(100), init_func=ud.init,
         interval=100, blit=True)
+plt.show()