Confirm fn_21069 (EffectActor::LaunchEffect)

Batch #17655 by eAthena: 0 byte-identical, 1 confirmed by peer review.

- fn_21069 EffectActor::LaunchEffect: logic confirmed by peer review (already on main)

Peer-reviewed-by: ragnarok-clanker, alisonrag, cremane, bibinir
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).

Source/Linkage/Source/Contents/Effects/Skills/PartyMemberEffects.cpp.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <list>
+
+class CRenderObject;
+
+extern template void std::list<CRenderObject*>::push_back(CRenderObject*&&);