Make client-side physics prop breakables disappear after the frame th…

…ey are destroyed to avoid bullets hitting something that ceases to exist while they are still examining it.

Thanks to the Strata Source team for finding this.

src/game/client/physpropclientside.cpp

@@ -406,6 +406,9 @@ void C_PhysPropClientside::StartFadeOut( float fDelay )
 
 void C_PhysPropClientside::Break()
 {
+	if ( IsMarkedForDeletion() )
+		return;
+
 	m_takedamage = DAMAGE_NO;
 
 	IPhysicsObject *pPhysics = VPhysicsGetObject();
@@ -443,10 +446,12 @@ void C_PhysPropClientside::Break()
 	// no damage/damage force? set a burst of 100 for some movement
 	params.defBurstScale = 100;
 
-	// spwan break chunks
+	// spawn break chunks
 	PropBreakableCreateAll( GetModelIndex(), pPhysics, params, this, -1, false );
 
-	Release(); // destroy object
+	// destroy object at end of frame
+	SetRemovalFlag( true );
+	AddToEntityList( ENTITY_LIST_DELETE );
 }
 
 void C_PhysPropClientside::Clone( Vector &velocity )