Unhandled exception with fall-from-roof animation

[Gennady Trafimenkov]

Copy of the bug reported on github https://github.com/gennady/ja2-stracciatella/issues/2

Game crashes when killing an enemy on a roof edge, directly after his animation of falling down from the roof and bleeding out finishes.

[Misanthopos]

Since I know the SegFault only happens at some situations (like looking north, bDirection == 0) I supplied a pull request for your convieniene. It could still happen though; time will tell.

Not sure if you get multiple pull requests or just my last. Would be good to know.