GUI_SCREEN_SHIPYARD and mission.addMessageText

[Capt. Murphy]

Hi,

Current trunk.

mission.addMessageText has odd results if used on GUI_SCREEN_SHIPYARD.

On first access to the screen the message is added at the very first line. On 2nd access it is added in the middle of the list of ships for sale, is selectable and the game engine acts as if you are selecting one of the ships for sale. On 3rd access it can be added in the message area at the bottom of the screen, where it is overwritten as you scroll through the ships for sale.