Fixed single character Say text not parsing correctly

Assets/Fungus/Narrative/Scripts/DialogParser.cs

@@ -68,12 +68,15 @@ namespace Fungus
 				m = m.NextMatch();
 			}
 
-			if (position < storyText.Length - 1)
+			if (position < storyText.Length)
 			{
 				string postText = storyText.Substring(position, storyText.Length - position);
+				if (postText.Length > 0)
+				{
 					AddWordsToken(tokens, postText);
 				}
 			}
+		}
 		
 		protected static void AddWordsToken(List<Token> tokenList, string words)
 		{