Fix stdout frontend not being available

The iota view is already exclusive in respect to the end value, so since
stdout was the first item it would unintentionally be skipped in the zip
operation.

src/getopts.cpp

@@ -100,7 +100,7 @@ bool parse(const QStringList &args) {
 
 	if (p.isSet(frontend_opt)) {
 		// find frontend, even if only a prefix matches
-		auto frontend_selection = std::views::zip(frontend_opts, std::views::iota(0UZ, frontend_opts.size() - 1)) | std::views::filter([&](const auto &i) { return std::string(std::get<0>(i)).starts_with(p.value(frontend_opt).toStdString()); });
+		auto frontend_selection = std::views::zip(frontend_opts, std::views::iota(0UZ, frontend_opts.size())) | std::views::filter([&](const auto &i) { return std::string(std::get<0>(i)).starts_with(p.value(frontend_opt).toStdString()); });
 		if (frontend_selection.empty()) {
 			// match must be unique
 			std::cerr << "frontend needs to be one of the following:" << frontends_descr << std::endl;