Entities now bail out of ticks if destroyed (#3363)

src/Mobs/Wither.cpp

@@ -69,6 +69,11 @@ bool cWither::DoTakeDamage(TakeDamageInfo & a_TDI)
 void cWither::Tick(std::chrono::milliseconds a_Dt, cChunk & a_Chunk)
 {
 	super::Tick(a_Dt, a_Chunk);
+	if (!IsTicking())
+	{
+		// The base class tick destroyed us
+		return;
+	}
 
 	if (m_WitherInvulnerableTicks > 0)
 	{