check if all types are the same

isTypesTheSame.vala

bool sus(params Type[] types){
    if (types.length != 0){
        var a = types[0];

        for (var i = 1; i < types.length; ++i){
            if (!a.is_a(types[i]))
                return false;
            else
                a = types[i];
        }
        return true;
    } 
    return false;
}

void main() {
    var a = sus(typeof(bool), typeof(bool), typeof(bool), typeof(bool));
    var b = sus(typeof(int), typeof(string), typeof(bool));
    prin(a, " ", b);
}

[Print]
void prin(string s){
    print(s + "\n");
}