Fix http://www.wowhead.com/quest=12415/the-horse-hollerer again after script for this quest was removed when http://www.wowhead.com/quest=12414/mounting-up was fixed in https://github.com/TrinityCore/TrinityCore/commit/2c6500a2319abef5cf46dbe227143c9df476aadf this commit removed script for this quest which had previously been fixed prior to this commit. (cherry picked from commit fa5931189dfe0e6aec8b7fd58075216077fff8c0)