ItemUtils - fix error when setting damage lower than 0 (SkriptLang#6870)

src/main/java/ch/njol/skript/bukkitutil/ItemUtils.java

@@ -105,7 +105,7 @@ public static void setMaxDamage(ItemStack itemStack, int maxDamage) {
 	public static void setDamage(ItemStack itemStack, int damage) {
 		ItemMeta meta = itemStack.getItemMeta();
 		if (meta instanceof Damageable) {
-			((Damageable) meta).setDamage(damage);
+			((Damageable) meta).setDamage(Math.max(0, damage));
 			itemStack.setItemMeta(meta);
 		}
 	}

src/test/skript/tests/syntaxes/expressions/ExprDurability.sk

@@ -13,6 +13,15 @@ test "durability":
 	assert damage of {_i} is {_max} with "max item damage failed"
 	assert durability of {_i} is 0 with "zero item durability failed"
 
+	# Test out of bound values
+	set durability of {_i} to 500
+	assert damage of {_i} is 0 with "damage of item should be 0 when setting durability higher than max"
+	assert durability of {_i} is {_max} with "durability of item should be max when setting higher than max"
+
+	set damage of {_i} to -1
+	assert damage of {_i} is 0 with "damage of item should be 0 when setting damage less than 0"
+	assert durability of {_i} is {_max} with "durability of item should be max when setting damage below 0"
+
 test "durability - custom" when running minecraft "1.20.5":
 	set {_i} to 1 of iron sword
 	set max durability of {_i} to 1000