Function validate_inner 

fn validate_inner(
    vd: Validator<'_>,
    block: &Block,
    data: &Everything,
    sc: &mut ScopeContext,
    have_value: TriBool,
    check_desc: bool,
) -> bool

Validate a block that’s part of a script value.

• have_value: indicates whether this script value has had some sort of value set already. It’s used to emit warnings when overwriting this value, or when assuming there is a value when there isn’t one. Has values True, False, or Maybe.
• check_desc: indicates whether localization errors are worth warning about. Some script values only have their breakdowns displayed while debugging, and those can have raw (non-localized) text in their descs.

Returns true iff this block did something useful. (Used for warnings)