Added comment about RT hash. Fixed memory leak in NavmeshList main.

espReader/ESPReader.h

@@ -3,6 +3,7 @@
 /* For reading structured data out of Creation Engine esp/esm files.
  * Based on information from:
  *     https://en.uesp.net/wiki/Skyrim_Mod:Mod_File_Format
+ *	   https://github.com/TES5Edit/TES5Edit
  *
  * esp/esm files generally have a tree-like structure where:
  * - top level is a a TES4 record concatenated with each of the top-level groups
@@ -29,6 +30,13 @@ extern "C" {
 
 #define RT_SIZE 128
 
+/* RT hash seed was externally calculated s.t. the fourcc codes perfectly hash into
+ * indices between 0 and 511. That is, there are no hashing collisions. This allows
+ * for hard coded lookup tables for the fourcc codes in a relatively small space.
+ * 
+ * A minimal perfect hash is also possible with an intermediate seed table, though
+ * I'm not sure which is faster, if it's worth trying to speed this up, etc.
+ */
 #define RT_HASH_SIZE 512
 #define RT_HASH_BITS 9
 #define RT_HASH_SEED 131261257