Description of Bug: Logging out with an active mindlink causes a crash (possibly related to receiving a message when logging out, such as from an effect expiring.
Reproduction Steps:

1.  Have an active mind link between yourself and someone else
2.  Escape > Log out
3.  Crash

Error message (if applicable): 

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ERROR in

action number 1

of Async Event: Networking

for object NetworkHandler:

Data structure with index does not exist.

at gml_Script_AddToBacklog

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gml_Script_AddToBacklog (line -1)

gml_Script_CreateNotification

gml_Script_PacketSwitcher

gml_Script_ReceiveNetworkMessage

gml_Object_NetworkHandler_Other_68