Reset shorcutting if actor can't move by z-axis on reaction time

If actor was shortcutting because it was swimming, then when it started
walking it still be shortcutting, but there will be no new path, because
shortcut path builds only for actor able moving by z-axis and pathfinder
path only for not shortcutting actor.

apps/openmw/mwmechanics/aipackage.cpp

@@ -132,8 +132,8 @@ bool MWMechanics::AiPackage::pathTo(const MWWorld::Ptr& actor, const osg::Vec3f&
         const bool actorCanMoveByZ = canActorMoveByZAxis(actor);
 
         // Prohibit shortcuts for AiWander, if the actor can not move in 3 dimensions.
-        if (actorCanMoveByZ)
-            mIsShortcutting = shortcutPath(position, dest, actor, &destInLOS, actorCanMoveByZ); // try to shortcut first
+        mIsShortcutting = actorCanMoveByZ
+            && shortcutPath(position, dest, actor, &destInLOS, actorCanMoveByZ); // try to shortcut first
 
         if (!mIsShortcutting)
         {