Ensure that TimedEventExecutor timings are closed (Fixes #1918)

pre this, any event handler firing an exception would leave the timings
open, causing the timings stack to be corrupted

Spigot-API-Patches/0004-Timings-v2.patch

@@ -1,4 +1,4 @@
-From 24d273e696fc58bf34246300ee6199f5dbb1f7ba Mon Sep 17 00:00:00 2001
+From f7754e7d136f3f3a688bc358e4e53cba5f1d44fb Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Mon, 29 Feb 2016 18:48:17 -0600
 Subject: [PATCH] Timings v2
@@ -169,7 +169,7 @@ index 000000000..8e0cd40e8
 +}
 diff --git a/src/main/java/co/aikar/timings/TimedEventExecutor.java b/src/main/java/co/aikar/timings/TimedEventExecutor.java
 new file mode 100644
-index 000000000..68f7866e1
+index 000000000..933ecf9bd
 --- /dev/null
 +++ b/src/main/java/co/aikar/timings/TimedEventExecutor.java
 @@ -0,0 +1,83 @@
@@ -251,9 +251,9 @@ index 000000000..68f7866e1
 +            executor.execute(listener, event);
 +            return;
 +        }
-+        timings.startTiming();
-+        executor.execute(listener, event);
-+        timings.stopTiming();
++        try (Timing ignored = timings.startTiming()){
++            executor.execute(listener, event);
++        }
 +    }
 +}
 diff --git a/src/main/java/co/aikar/timings/Timing.java b/src/main/java/co/aikar/timings/Timing.java