fix: values assignment for the input signals

[gcroci2]

I just noticed that PR #40 broke the assignment of the value for the input signals. In particular, the input signal needs to be set to 0 both if the modality is 'X' and if the modality is not the same as the one indicated in the sequence (e.g., the sequence has 'v', but the input signal we're building up is 'a').

[DaniBodor]

Good catch!
Is there a way to add a test to prevent this mistake from slipping back in in the future?

I have a minor readability suggestion, but it is also fine as you wrote it if you prefer.

[gcroci2]

Good catch! Is there a way to add a test to prevent this mistake from slipping back in in the future?

Good point, I added a test for that :)

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

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