fix helmet damage reduction inconsistencies

See: https://github.com/PaperMC/Paper/issues/9555#issuecomment-1681120506

patches/server/1045-Fix-helmet-damage-reduction-inconsistencies.patch

@@ -0,0 +1,21 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Lulu13022002 <41980282+Lulu13022002@users.noreply.github.com>
+Date: Sat, 27 Apr 2024 21:51:58 +0200
+Subject: [PATCH] Fix helmet damage reduction inconsistencies
+
+Affect the falling stalactite damage type where the
+reduction is not applied like in Vanilla
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+index 544567e576023709f86abf57963c37a5490ab9f0..5a9c68b60cf3bf694fe1fcd3b095516b6481f8a2 100644
+--- a/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
++++ b/src/main/java/org/bukkit/craftbukkit/event/CraftEventFactory.java
+@@ -1215,7 +1215,7 @@ public class CraftEventFactory {
+         Map<DamageModifier, Function<? super Double, Double>> modifierFunctions = new EnumMap<>(DamageModifier.class);
+         modifiers.put(DamageModifier.BASE, rawDamage);
+         modifierFunctions.put(DamageModifier.BASE, CraftEventFactory.ZERO);
+-        if (source.is(DamageTypes.FALLING_BLOCK) || source.is(DamageTypes.FALLING_ANVIL)) {
++        if (source.is(DamageTypeTags.DAMAGES_HELMET)) { // Paper
+             modifiers.put(DamageModifier.HARD_HAT, hardHatModifier);
+             modifierFunctions.put(DamageModifier.HARD_HAT, hardHat);
+         }