Fixed raceID for Pandarens in playercreateinfo_spell

I finally fixed an annoying bug which fucked up the spell tree for Night Elf\Undead Rogues as you can see here: https://github.com/ProjectSkyfire/SkyFire_5xx/issues/141
raceID in playercreateinfo_spell follows the power of 2 and obviously 24 is NOT a power of 2 but the correct value is 2^24 = 16777216