Some emplace_back replacements (#5149)

* replace push_back with emplace_back when a new object was created in the function call

src/Entities/Painting.cpp

@@ -34,7 +34,7 @@ void cPainting::GetDrops(cItems & a_Items, cEntity * a_Killer)
 {
 	if ((a_Killer != nullptr) && a_Killer->IsPlayer() && !static_cast<cPlayer *>(a_Killer)->IsGameModeCreative())
 	{
-		a_Items.push_back(cItem(E_ITEM_PAINTING));
+		a_Items.emplace_back(E_ITEM_PAINTING);
 	}
 }