Fix Non-swimming enemies entering water if player is water walking (bug #5099)

CHANGELOG.md

@@ -114,6 +114,7 @@
     Bug #5082: Scrolling with controller in GUI mode is broken
     Bug #5092: NPCs with enchanted weapons play sound when out of charges
     Bug #5093: Hand to hand sound plays on knocked out enemies
+    Bug #5099: Non-swimming enemies will enter water if player is water walking
     Feature #1774: Handle AvoidNode
     Feature #2229: Improve pathfinding AI
     Feature #3025: Analogue gamepad movement controls

apps/openmw/mwmechanics/aicombataction.cpp

@@ -422,6 +422,11 @@ namespace MWMechanics
                 return true;
         }
 
+        if (actor.getClass().isPureLandCreature(actor) && MWBase::Environment::get().getWorld()->isWalkingOnWater(enemy))
+        {
+            return false;
+        }
+
         if (actor.getClass().isPureFlyingCreature(actor) || actor.getClass().isPureLandCreature(actor))
         {
             if (MWBase::Environment::get().getWorld()->isSwimming(enemy))