Fix loadWaveSpawnSchema in Model
Fix loadWaveSpawnSchema in Model

sdh31/tower_defense,jordanly/oogasalad_OOGALoompas,garysheng/tower-defense-game-engine,kevinkdo/oogasalad_OOGALoompas,codylieu/oogasalad_OOGALoompas,dianwen/oogasalad_TowerDefense,dennis-park/OOGALoompas