Fix #15170: Plugin: incorrect label text alignment (#15175)

Initialise CustomWidgetDesc::TextAlign.

distribution/changelog.txt

@@ -8,6 +8,7 @@
 - Fix: [#15096] Crash when placing entrances in the scenario editor near the map corner.
 - Fix: [#15142] ToonTowner's mine roofs were moved into the pirate theme scenery group instead of the mine theme scenery group.
 - Fix: [#15148] Track Designs Manager delete confirmation window doesn't display properly.
+- Fix: [#15170] Plugin: incorrect label text alignment.
 - Improved: [#3417] Crash dumps are now placed in their own folder.
 - Change: [#8601] Revert ToonTower base block fix to re-enable support
 blocking.

src/openrct2-ui/scripting/CustomWindow.cpp

@@ -62,7 +62,7 @@ namespace OpenRCT2::Ui::Windows
         std::string Name;
         ImageId Image;
         std::string Text;
-        TextAlignment TextAlign;
+        TextAlignment TextAlign{};
         colour_t Colour{};
         std::string Tooltip;
         std::vector<std::string> Items;