Testing with kernel dimensions of 0,0,0,0 is likely to cause invalid configuration argument error

[cwpearson]

https://github.com/illinois-impact/gpu-algorithms-labs/blob/490e9f8060457634df553d8897f60bfaa49179e6/labs/basic_conv/main.cu#L180

Students will often launch a kernel with one of these dimensions as a kernel parameter, which will cause their launch to fail. I think the pedagogical value of that experience is low.