Merge #4637

4637: Only record snapshot of the currently active tee r=def- a=heinrich5991

Fixes #4636.

<!-- What is the motivation for the changes of this pull request -->

## Checklist

- [ ] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test if it works standalone, system.c especially
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: heinrich5991 <heinrich5991@gmail.com>

src/engine/client/client.cpp

@@ -2015,6 +2015,8 @@ void CClient::ProcessServerPacket(CNetChunk *pPacket, int Conn, bool Dummy)
 					// add new
 					m_SnapshotStorage[Conn].Add(GameTick, time_get(), SnapSize, pTmpBuffer3, 1);
 
+					if(!Dummy)
+					{
 						// for antiping: if the projectile netobjects from the server contains extra data, this is removed and the original content restored before recording demo
 						unsigned char aExtraInfoRemoved[CSnapshot::MAX_SIZE];
 						mem_copy(aExtraInfoRemoved, pTmpBuffer3, SnapSize);
@@ -2029,6 +2031,7 @@ void CClient::ProcessServerPacket(CNetChunk *pPacket, int Conn, bool Dummy)
 								DemoRecorder.RecordSnapshot(GameTick, aExtraInfoRemoved, SnapSize);
 							}
 						}
+					}
 
 					// apply snapshot, cycle pointers
 					m_ReceivedSnapshots[Conn]++;