eitd/sectionsd.cpp: fix busywait loop after service stop

src/eitd/dmx.cpp

@@ -283,6 +283,7 @@ int DMX::getSection(uint8_t *buf, const unsigned timeoutInMSeconds, int &timeout
 	lock();
 	if (!isOpen()) {
 		unlock();
+		timeouts = -1;
 		return -1;
 	}
 

src/eitd/sectionsd.cpp

@@ -980,6 +980,7 @@ static void commandserviceStopped(int connfd, char * /* data */, const unsigned
 	threadCN.unlock();
 	threadEIT.unlock();
 	threadCN.stopUpdate();
+	current_channel_id = 0;
 	xprintf("[sectionsd] commandserviceStopped done\n");
 }