SPIGOT-1755: CommandBlock doesn't run on empty world

nms-patches/CommandBlockListenerAbstract.patch

@@ -33,7 +33,7 @@
                  } catch (Throwable throwable) {
                      CrashReport crashreport = CrashReport.a(throwable, "Executing command block");
                      CrashReportSystemDetails crashreportsystemdetails = crashreport.a("Command to be executed");
-@@ -123,6 +133,130 @@
+@@ -123,6 +133,125 @@
          }
      }
  
@@ -58,11 +58,6 @@
 +            return 0;
 +        }
 +
-+        // If the world has no players don't run
-+        if (sender.getWorld().players.isEmpty()) {
-+            return 0;
-+        }
-+
 +        // Handle vanilla commands;
 +        org.bukkit.command.Command commandBlockCommand = commandMap.getCommand(args[0]);
 +        if (sender.getWorld().getServer().getCommandBlockOverride(args[0])) {