Codechange: Pass NWidgetParts as span instead of begin/end pointers. (#12779)

src/date_gui.cpp

@@ -200,7 +200,7 @@ static WindowDesc _set_date_desc(
 	WDP_CENTER, nullptr, 0, 0,
 	WC_SET_DATE, WC_NONE,
 	0,
-	std::begin(_nested_set_date_widgets), std::end(_nested_set_date_widgets)
+	_nested_set_date_widgets
 );
 
 /**