Have PlayerAnimator ignore renderers for which no layers/models are stored, fixes #518

This will stop the crashing but might well mean broken animations - for now there's not much I can do about that

src/main/java/electroblob/wizardry/client/animation/PlayerAnimator.java

@@ -133,9 +133,21 @@ public class PlayerAnimator {
 
 	private static void updateModels(EntityPlayer player, Render<?> renderer, float partialTicks, boolean firstPerson){
 
+		// TODO: This will stop the crashing but it might break animations for any mod that replaces the player renderer
+		//       There may be a way to make it compatible but we'll have to look into that at a later date
+		List<ModelBiped> models = playerLayerModels.get(renderer);
+
+		// If no models were registered for the given renderer, don't do anything
+		if(models != null){
+
+			List<LayerRenderer<? extends EntityLivingBase>> layers = playerLayers.get(renderer);
+
+			// If no layers were registered for the given renderer there's no point trying to lazy-load anything!
+			if(layers != null){
+
 				// Biped armour is special because of Forge's armour item render hook
 				// This needs to be lazy-loaded because we need access to an actual item
-		for(LayerRenderer<? extends EntityLivingBase> layer : playerLayers.get(renderer)){
+				for(LayerRenderer<? extends EntityLivingBase> layer : layers){
 					if(layer instanceof LayerBipedArmor){
 						for(EntityEquipmentSlot slot : InventoryUtils.ARMOUR_SLOTS){
 
@@ -144,8 +156,6 @@ public class PlayerAnimator {
 							// optimise it further, we *have* to retrieve the model every time (shouldn't be too bad though)
 							ModelBiped model = ForgeHooksClient.getArmorModel(player, armour, slot, ((LayerBipedArmor)layer).getModelFromSlot(slot));
 
-					List<ModelBiped> models = playerLayerModels.get(renderer);
-
 							if(!models.contains(model)){ // Ignore already-wrapped models
 								models.add(model);
 								ModelRendererExtended.wrap(model);
@@ -153,6 +163,7 @@ public class PlayerAnimator {
 						}
 					}
 				}
+			}
 
 			for(Animation animation : animations){
 
@@ -160,7 +171,7 @@ public class PlayerAnimator {
 
 					boolean autoRotateSecondLayer = animation.autoRotateSecondLayer(player, firstPerson);
 
-				for(ModelBiped model : playerLayerModels.get(renderer)){
+					for(ModelBiped model : models){
 
 						animation.setRotationAngles(player, model, partialTicks, firstPerson);
 
@@ -170,6 +181,7 @@ public class PlayerAnimator {
 					}
 				}
 			}
+		}
 
 	}