DRY up and document magic constant used for hash maps

modules/ripple_data/crypto/ripple_Base58Data.cpp

@@ -109,16 +109,8 @@ bool CBase58Data::operator> (const CBase58Data& b58) const { return CompareTo(b5
 
 std::size_t hash_value(const CBase58Data& b58)
 {
-    // VFALCO: TODO, figure out what this is for and whether or
-    //               not it affects the protocol specification.
-    //
-    //         NOTE, this constant is used elsewhere as well.
-    //               should it be DRY?
-    //
-    const std::size_t mysteriousConstant = 0x9e3779b9;
-
     std::size_t seed = HashMaps::getInstance ().getNonce <size_t> ()
-                       + (b58.nVersion * mysteriousConstant);
+                       + (b58.nVersion * HashMaps::goldenRatio);
 
     boost::hash_combine (seed, b58.vchData);