In hbb_tutorials, chapter 7, example 4 iterator for projection too small

[michalkornek]

https://github.com/nengo/nengo-gui/blob/31428d66e15ec13851176c14e455c16a04cfa209/nengo_gui/examples/hbb_tutorials/chapter7/4-spa_sequencerouted_cleanupAll.py#L86

I think this should be: for i in range(vsize):

otherwise, the state for letter E is not projected (the value fluctuates closely around 0). Unless this is the expected behaviour?