Fix bug where discriminators would not update in PRESENCE_UPDATE.
Fix bug where discriminators would not update in PRESENCE_UPDATE.

variablehair/Eggplantato,Harmon758/discord.py,rapptz/discord.py,Rapptz/discord.py,khazhyk/discord.py,Harmon758/discord.py,mgardne8/discord.py,lgkern/PriestPy,imayhaveborkedit/discord.py