Fix AirShip AIR count

Signed-off-by: Lixfel <agga-games@gmx.de>

SchematicSystem_Core/src/de/steamwar/schematicsystem/autocheck/AutoCheckerResult.java

@@ -89,7 +89,7 @@ public class AutoCheckerResult {
     }
 
     public boolean isBlockCountOk() {
-        return type.getMaxBlocks() == 0 || blockCounts.values().stream().reduce(Integer::sum).map(i -> i <= type.getMaxBlocks()).orElse(false);
+        return type.getMaxBlocks() == 0 || blockCounts.entrySet().stream().filter(entry -> entry.getKey() != Material.AIR).map(Map.Entry::getValue).reduce(Integer::sum).map(i -> i <= type.getMaxBlocks()).orElse(false);
     }
 
     public boolean isLimitedBlocksOK() {