Crash when pasting geometry in edit mode

[b-sharman]

How to reproduce

1. Join the Imprimis editing server and enter edit mode.
2. Make a selection with the mouse.
3. Press c to copy it.
4. Press v to paste the geometry.

Game crashes and console says:

inconsistent msg size for 45 (14 != 15)

This appears to come from the following:

imprimis/game/gameclient.cpp

Lines 1177 to 1180 in 2af7aa8

	if(msgsize && num!=msgsize)
	{
	fatal("inconsistent msg size for %d (%d != %d)", type, num, msgsize);
	}

Expected behavior
Whatever geometry was in the selection when copying should be duplicated in the selection when pasting.

Important Information:

• OS: Arch Linux with kernel 5.18.1.arch1-1 and nvidia 515.43.04-7
• Commit hash: 2af7aa8

[b-sharman]

crash.mp4