Having your gun pulled out of your hands mid-reload throws an error

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Describe the bug

As per title: if, say, a zombie technician pulls the gun out of your hands while reloading the game throws an error.

Steps To Reproduce

Steps to reproduce the behavior:

1. Make a player with a gun (with a long reloading time preferably), magazine, and some ammo.
2. Spawn a zombie technician nearby.
3. Shoot at something, then reload in line of sight of the zombie techie.
4. Repeat until gun gets pulled away mid-reload.

Expected behavior

Nothing game-breaking happens, but I guess having a message in logs saying that the gun went away would be prettier.

Additional context

Error report:

 DEBUG    : reload target is null, failed to reload

 FUNCTION : void activity_handlers::reload_finish(player_activity*, player*)
 FILE     : src/activity_handlers.cpp
 LINE     : 1837

Game Version

0.D-10214-ge667aa0