Alter fall particles to respect visibility API. Fixes BUKKIT-5158

Bukkits Visibility API should prevent players from seeing fall particles
of players that they cannot see.  This commit alters the handling to
provide an EntityPlayer argument that is later used to determine if they
are visible.

src/main/java/net/minecraft/server/EntityLiving.java

@@ -127,7 +127,14 @@ public abstract class EntityLiving extends Entity {
                     block = this.world.getType(i, j - 1, k);
                 }
             } else if (!this.world.isStatic && this.fallDistance > 3.0F) {
-                this.world.triggerEffect(2006, i, j, k, MathHelper.f(this.fallDistance - 3.0F));
+                // CraftBukkit start - supply player as argument in particles for visibility API to work
+                if (this instanceof EntityPlayer) {
+                    this.world.a((EntityHuman) this, 2006, i, j, k, MathHelper.f(this.fallDistance - 3.0F));
+                    ((EntityPlayer) this).playerConnection.sendPacket(new PacketPlayOutWorldEvent(2006, i, j, k, MathHelper.f(this.fallDistance - 3.0F), false));
+                } else {
+                    this.world.triggerEffect(2006, i, j, k, MathHelper.f(this.fallDistance - 3.0F));
+                }
+                // CraftBukkit end
             }
 
             block.a(this.world, i, j, k, this, this.fallDistance);