ParticleBuilder.hasReceivers shouldnt return true if no players are in the world

Spigot-API-Patches/0102-Expand-World.spawnParticle-API-and-add-Builder.patch

@@ -1,4 +1,4 @@
-From 4d48c8f3cf54c6845922fb62b32adcab7d1558dd Mon Sep 17 00:00:00 2001
+From 6583e28c44eaa9d3a5f6fa225e4dafa82d2aa95e Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Tue, 29 Aug 2017 23:58:48 -0400
 Subject: [PATCH] Expand World.spawnParticle API and add Builder
@@ -10,7 +10,7 @@ This adds a new Builder API which is much friendlier to use.
 
 diff --git a/src/main/java/com/destroystokyo/paper/ParticleBuilder.java b/src/main/java/com/destroystokyo/paper/ParticleBuilder.java
 new file mode 100644
-index 00000000..ef07ab3c
+index 00000000..bf4edd07
 --- /dev/null
 +++ b/src/main/java/com/destroystokyo/paper/ParticleBuilder.java
 @@ -0,0 +1,363 @@
@@ -96,7 +96,7 @@ index 00000000..ef07ab3c
 +     * @return If this particle is going to be sent to someone
 +     */
 +    public boolean hasReceivers() {
-+        return receivers == null || !receivers.isEmpty();
++        return (receivers == null && !location.getWorld().getPlayers().isEmpty()) || !receivers.isEmpty();
 +    }
 +
 +    /**