ACF9: Fix cannibal talking to himself in cut scene if playing with 3 natives instead of 4

ACF6: Change mines, remove mines placed at unfair positions MinesNum was set to a non-zero value. Some mines ended up in weird positions like directly under a crate. Now all mines and barrels are placed manually.

ACF3: Fix cannibals sometimes doing nothing for a full turn This was because hogs got confused because walking was forbidden by SetInputMask. Now we use a proper hedgehog effect heArtillery.