MyGUI 3.4.1 link error: "undefined reference to `typeinfo for MyGUI::ControllerRepeatClick'" (dynamic linking only)

Static linking of the newly released MyGUI 3.4.1 completes.

Dynamic linking, however, errors with "undefined reference to `typeinfo for MyGUI::ControllerRepeatClick'":

/usr/bin/ld: CMakeFiles/openmw.dir/mwgui/tradewindow.cpp.o:(.data.rel+0x4398): undefined reference to `typeinfo for MyGUI::ControllerRepeatClick'
/usr/bin/ld: CMakeFiles/openmw.dir/mwgui/alchemywindow.cpp.o:(.data.rel+0x4998): undefined reference to `typeinfo for MyGUI::ControllerRepeatClick'

Filed https://github.com/MyGUI/mygui/issues/213