[fixed] trick to using schedule command

I'm having some trouble setting up a scheduled command properly.

I place down a new building (%b) which works fine.

Then I add a scheduled command to have it spawn a unit ...

%b.AItrain(8000,...);

this gets called immediately without the expected wait.

which is bad, because the end of the function ... it spawns another .. and another, until the game crashes.

// -------------------------------------
function RTSUnit::AiTrain(%this,%index,%conn)
{
   echo("c2 AiTrain -- enter");
   %state = %this.getState();
   
   // cancel any pending spawns if building is destroyed
   if ( (%state $= "Dead") || (! isObject(%this)) )
      {
         echo("AI building destroyed - canceling its build cycle");
         cancel(%this.spawnAI);
         return;
      }   
   
   // location to build unit
   %location = %this.getId().getTransform();
   %startX = getWord(%location, 0);              
   %startY = getWord(%location, 1);   
   %location = %startX SPC %startY SPC "250" SPC "0 0" SPC %conn.getTeam();
   
   // build the unit
   %conn.createPlayer(%location, %index);   
   MapHud.createPingEvent(%startX SPC %startY, "1 0 0"); // red ... DEBUG (JY)
   
   // determine the next unit to spawn
   %newUnit = getRandom(4,6);
   
   // and time to build it
   switch(%newUnit)
   {
      case 4:      
        %builtTime = 4000; // 4s
      case 5:
        %builtTime = 8000; // 8s
      case 6:
        %builtTime = 9000; // 9s
   }
   
   // create next spawn            
   %this.spawnAI = %this.schedule(%buildTime,"AiTrain",%newUnit,%conn); 
   echo("c2 AiTrain -- exit");
}