Clear client flags in ClientDisconnect, because engine doesn't clear them before calling ClientConnect, but only before ClientPutInServer, on next connection to this slot.

Same as 5caf49f063

dlls/client.cpp

@@ -126,6 +126,7 @@ void ClientDisconnect( edict_t *pEntity )
 	pEntity->v.takedamage = DAMAGE_NO;// don't attract autoaim
 	pEntity->v.solid = SOLID_NOT;// nonsolid
 	pEntity->v.effects = 0;// clear any effects
+	pEntity->v.flags = 0;// clear any flags
 	UTIL_SetOrigin( &pEntity->v, pEntity->v.origin );
 
 	g_pGameRules->ClientDisconnected( pEntity );