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

src/transparency_gui.cpp

@@ -152,7 +152,7 @@ static WindowDesc _transparency_desc(
 	WDP_MANUAL, "toolbar_transparency", 0, 0,
 	WC_TRANSPARENCY_TOOLBAR, WC_NONE,
 	0,
-	std::begin(_nested_transparency_widgets), std::end(_nested_transparency_widgets)
+	_nested_transparency_widgets
 );
 
 /**