fix domain warp frequency issue

common/src/main/java/com/dfsek/terra/config/loaders/ProbabilityCollectionLoader.java

@@ -28,6 +28,7 @@ public class ProbabilityCollectionLoader implements TypeLoader<ProbabilityCollec
                 List<Map<Object, Integer>> map = (List<Map<Object, Integer>>) o;
                 for(Map<Object, Integer> l : map) {
                     for(Map.Entry<Object, Integer> entry : l.entrySet()) {
+                        if(entry.getValue() == null) throw new LoadException("No probability defined for entry \"" + entry.getKey() + "\"");
                         Object val = configLoader.loadType(generic, entry.getKey());
                         collection.add(val, entry.getValue());
                     }

common/src/main/java/com/dfsek/terra/config/loaders/SelfProbabilityCollectionLoader.java

@@ -41,6 +41,7 @@ public class SelfProbabilityCollectionLoader<T> implements TypeLoader<Probabilit
 
     private void addItems(ConfigLoader loader, ProbabilityCollection<T> collection, Type generic, Map<Object, Integer> l) throws LoadException {
         for(Map.Entry<Object, Integer> entry : l.entrySet()) {
+            if(entry.getValue() == null) throw new LoadException("No probability defined for entry \"" + entry.getKey() + "\"");
             if(entry.getKey().toString().equals("SELF")) {
                 collection.add(null, entry.getValue()); // hmm maybe replace this with something better later
                 continue;