Fix Dragon Server Crashes

If the dragon tries to find "ground" and hits a hole, or off edge,
it will infinitely keep looking for non air and eventually crash.

scripts/importmcdev.sh

@@ -63,6 +63,7 @@ import DataConverterMaterialId
 import DataInspectorBlockEntity
 import DataPalette
 import DefinedStructure
+import DragonControllerLandedFlame
 import EnchantmentManager
 import Enchantments
 import EntityLlama