Guard against all possible nulls to be on the safe side, fixes #517

src/main/java/electroblob/wizardry/client/model/BakedModelGenerateOverrides.java

@@ -119,7 +119,9 @@ public class BakedModelGenerateOverrides implements IBakedModel {
 
 			IBakedModel original = event.getModelRegistry().getObject(location);
 
-			if(original != null){
+			// Ignore the warnings, IntelliJ is right that these can't be null in the dev environment but certain
+			// mods seem to be doing ASM hackery that makes it so they can be null
+			if(original != null && original.getOverrides() != null && original.getOverrides().getOverrides() != null){
 				original.getOverrides().getOverrides().stream().map(ItemOverride::getLocation)
 						.filter(l -> l.getPath().contains(OVERRIDE_GENERATORS)).findFirst()
 						.ifPresent(l -> event.getModelRegistry().putObject(location,