fix (data): Cap coin updates.

Fixes an issue where the session system could overflow `members.coins`.

bot/modules/study/tracking/settings.py

@@ -77,6 +77,7 @@ class hourly_reward(settings.Integer, settings.GuildSetting):
     desc = "Number of LionCoins given per hour of study."
 
     _default = 50
+    _max = 32767
 
     long_desc = (
         "Each spent in a voice channel will reward this number of LionCoins."
@@ -99,6 +100,7 @@ class hourly_live_bonus(settings.Integer, settings.GuildSetting):
     desc = "Number of extra LionCoins given for a full hour of streaming (via go live or video)."
 
     _default = 10
+    _max = 32767
 
     long_desc = (
         "LionCoin bonus earnt for every hour a member streams in a voice channel, including video. "