Fix TF2_OnIsHolidayActive forward not getting called after map change #1752
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Fixes #1747
After a map change, the virtual hook on
IsHolidayActive
will be invalid due to the gamerules object being destroyed, but current code does not attempt to hook it again if a plugin using theTF2_OnIsHolidayActive
forward is still loaded.Always unhook on level change, and check for plugins using the forward only in
HolidayManager::OnPluginUnloaded
.