Small fixes from the test branch now released as stable.

0.8.4.24

• When brand new vehicles are loaded, the vehicle's schedule is checked and only compatible vehicles with destinations buildings are loaded - this is when you have in the production line many different vehicles and you would like to distribute them into buildings to use them
• Fixed problem when production line directly connected to container harbor, vehicles placed directly into container harbors causing various problems, when sent to depot
• Added code to avoid badly initialized vehicles (on the NaN position and/or hearing constants SFX)
• Added debug console to cheat menu to catch when crash occur at specific vehicle or building