Fix: An error could occur if a fax message was removed just as it was animating into view. Fixes issue 1541.
Fix: Patients could sometimes be told to go home multiple times. Fixes issue 1538.
Fix: The tooltip for the tutorial button was incorrect since the dialog has been visually changed.
Fix: If a queueing patient was heading for a drinks machine just as the player moved that machine the game would crash.

Added: A helpful message when the player puts more Researchers in the research department than there are desks.

git-svn-id: http://corsix-th.googlecode.com/svn/trunk@2245 c39591fa-788f-11de-a72b-d90af8dea425