Fix bug in stim_PulseTrain

[fguerit]

hi @neurongeek ;)

I think it's probably beacuse of a rounding error with the use of ceil but sometimes this function crashes, and that can be fixed by changing:

Istim = ModWave .* Istim;

to

Istim = ModWave .* Istim(1:length(ModWave));

happy to submit a change in the code, but need to be given rights to contribute to this repo

[neurongeek]

hi @fguerit,

I believe you are right, it's probably because different sizes of the carrier vs the modulator arrays. I am adding you to the edit rights! ;)