Add event call helper

This simplifies new event calling by reducing the diff to actually fire the event and check for cancelled state.

Spigot-API-Patches/0024-Add-a-call-helper-to-Event.patch

@@ -0,0 +1,44 @@
+From 82df1be4b32c98bc98852d11792b42808db38322 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Sun, 19 May 2013 20:36:58 -0400
+Subject: [PATCH] Add a call helper to Event
+
+Reduces diff in Server patches
+
+diff --git a/src/main/java/org/bukkit/event/Event.java b/src/main/java/org/bukkit/event/Event.java
+index 6677e1b..eaf6c49 100644
+--- a/src/main/java/org/bukkit/event/Event.java
++++ b/src/main/java/org/bukkit/event/Event.java
+@@ -1,5 +1,6 @@
+ package org.bukkit.event;
+ 
++import org.bukkit.Bukkit;
+ import org.bukkit.plugin.PluginManager;
+ 
+ /**
+@@ -33,6 +34,22 @@ public abstract class Event {
+         this.async = isAsync;
+     }
+ 
++    // Paper start
++    /**
++     * Calls the event and tests if cancelled.
++     *
++     * @return if event was cancelled, if cancellable. otherwise true.
++     */
++    public boolean callEvent() {
++        Bukkit.getPluginManager().callEvent(this);
++        if (this instanceof Cancellable) {
++            return !((Cancellable) this).isCancelled();
++        } else {
++            return true;
++        }
++    }
++    // Paper end
++
+     /**
+      * Convenience method for providing a user-friendly identifier. By
+      * default, it is the event's class's {@linkplain Class#getSimpleName()
+-- 
+2.7.3
+