some fixes

libs/client_server/piclientserver_client_base.cpp

@@ -80,8 +80,9 @@ void PIClientServer::ClientBase::init() {
 
 
 void PIClientServer::ClientBase::destroy() {
-	can_write = false;
 	write_mutex.lock();
+	close();
 	piDeleteSafety(tcp);
+	write_mutex.unlock();
 	// piCout << "Destroyed";
 }

libs/io_utils/pistreampacker.cpp

@@ -120,6 +120,7 @@ void PIStreamPacker::send(const PIByteArray & data) {
 
 
 void PIStreamPacker::received(const uchar * readed, ssize_t size) {
+	if (size <= 0) return;
 	received(PIByteArray(readed, size));
 }