allow empty dialogues (needs fixing)

src/ending.rs

@@ -8,9 +8,15 @@ pub struct Ending {
 impl From<String> for Ending {
     fn from(string: String) -> Ending {
         let string = string.replace("END ", "");
+        // todo this is wrong - we shouldn't be splitting on lines
         let id_dialogue: Vec<&str> = string.lines().collect();
         let id = id_dialogue[0].to_string();
-        let dialogue = id_dialogue[1].to_string();
+
+        let dialogue = if id_dialogue.len() > 1 {
+             id_dialogue[1]
+        } else {
+            ""
+        }.to_string();
 
         Ending { id, dialogue }
     }