Sector wave spawning fixes

core/src/mindustry/ai/WaveSpawner.java

@@ -21,6 +21,7 @@ import static mindustry.Vars.*;
 public class WaveSpawner{
     private static final float margin = 40f, coreMargin = tilesize * 2f, maxSteps = 30;
 
+    private int tmpCount;
     private Seq<Tile> spawns = new Seq<>();
     private boolean spawning = false;
     private boolean any = false;
@@ -162,6 +163,18 @@ public class WaveSpawner{
         }
     }
 
+    public int countGroundSpawns(){
+        tmpCount = 0;
+        eachGroundSpawn((x, y) -> tmpCount ++);
+        return tmpCount;
+    }
+
+    public int countFlyerSpawns(){
+        tmpCount = 0;
+        eachFlyerSpawn((x, y) -> tmpCount ++);
+        return tmpCount;
+    }
+
     public boolean isSpawning(){
         return spawning && !net.client();
     }