Config fix

Saving primitive defaults even if def is null

ButtonCore/src/main/java/buttondevteam/lib/architecture/ConfigData.java

@@ -56,6 +56,9 @@ public class ConfigData<T> { //TODO: Save after a while
 			val = primitiveDef;
 		}
 		if (!saved && Objects.equals(val, primitiveDef)) { //String needs .equals()
+			if (def == null && config != null) //In Discord's case def may be null
+				config.set(path, primitiveDef);
+			else
 				set(def); //Save default value - def is always set
 			saved = true;
 		}