skip dying for patients that are in a room
skip "empty action queue" error handler for patients that are going home

this fixes a problem where patients with an empty action queue are
counted as patients sent home or are cured again. the fix for that
caused another bug that is fixed with the commit before in the same
pull request
"dead" mood is no longer set if health drops below 0.1
deactivate "sad6" mood only if patient dies

otherwise there would be exactly one day tick where the person shows no mood at all
Merge pull request #167 from phillipp/feature/skip-dying-in-rooms

Conflicts:
	CorsixTH/Lua/entities/patient.lua