[BUG] //ktx bp not emitted in dmm4 mode.

[dsvensson]

When running dmm4 backpacks are silently removed without emitting //ktx bp even if preceded by a //ktx drop ...

https://github.com/QW-Group/ktx/blob/master/src/items.c#L2460-L2473

	if (deathmatch == 4)
	{
		...
		ent_remove(self);
		return;
	}

	new = self->s.v.items;
	if (new)
	{
		if ((new & IT_ROCKET_LAUNCHER) || (new & IT_LIGHTNING))
		{
			stuffcmd_flags(other, STUFFCMD_DEMOONLY, "//ktx bp %d %d\n", NUM_FOR_EDICT(self),
							NUM_FOR_EDICT(other));
		}
	}

Either emit it, or drop the //ktx drop .... The behavior is different in dmm4, but there should be at least be a 1:1 match between drop and bp.