Fix action is_present field not being reset

[erlingrj]

See lf-lang/lingua-franca#2409

[edwardalee]

LGTM! I'll look at the lingua-franca PR next.

[erlingrj]

@edwardalee there is still some issue with that I am debugging. I can ping you when it is resolved!

[edwardalee]

@edwardalee there is still some issue with that I am debugging. I can ping you when it is resolved!

Looking more closely at this:

temp.pr(
    enclaveStruct
        + ".is_present_fields["
        + CUtil.bankIndex(instance)
        + " + "
        + enclaveInfo.numIsPresentFields
        + " + count] = &"
        + portRef
        + con
        + "is_present;");

I think maybe instead of bankIndex(instance) it should be bankIndex(port.getParent()).