SPIGOT-3373: Fix /execute in gameloop functions

By: md_5 <git@md-5.net>

paper-server/nms-patches/CustomFunctionData.patch

@@ -1,6 +1,22 @@
 --- a/net/minecraft/server/CustomFunctionData.java
 +++ b/net/minecraft/server/CustomFunctionData.java
-@@ -33,7 +33,7 @@
+@@ -23,7 +23,14 @@
+     private CustomFunction f;
+     private final ArrayDeque<CustomFunctionData.a> g = new ArrayDeque();
+     private boolean h = false;
+-    private final ICommandListener i = new ICommandListener() {
++    // CraftBukkit start
++    private final ICommandListener i = new CustomFunctionListener();
++
++    public class CustomFunctionListener implements ICommandListener {
++
++        protected org.bukkit.command.CommandSender sender = new org.bukkit.craftbukkit.command.CraftFunctionCommandSender(this);
++        // CraftBukkit end
++
+         public String getName() {
+             return CustomFunctionData.this.e;
+         }
+@@ -33,7 +40,7 @@
          }
  
          public World getWorld() {
@@ -9,7 +25,7 @@
          }
  
          public MinecraftServer C_() {
-@@ -57,7 +57,7 @@
+@@ -57,7 +64,7 @@
      }
  
      public int c() {
@@ -18,7 +34,7 @@
      }
  
      public Map<MinecraftKey, CustomFunction> d() {
-@@ -65,7 +65,7 @@
+@@ -65,7 +72,7 @@
      }
  
      public void e() {