[v2.2.9 RC1] Z_Free: wrong id at r_patch.c:100 when dedicated server exits multiplayer special stage

	if (patch->columnofs)
		Z_Free(patch->columnofs); // crash line

I have a funny feeling it's another double free case, but dedicated has no reason in caching the patch in the first place.

added Bug label

mentioned in merge request !1451 (merged)

closed via merge request !1451 (merged)

mentioned in commit 1d863408