Extend the benefits of [6c8aeb1] to the ASI recorder.

[6c8aeb1] allowed DVB recorders to continue recording after a loss of signal.
Not making the same improvement to the ASI recorder was simply an oversight at
the time. It took me a while to find the time to test the ASI patch once I
realized my oversight.

mythtv/libs/libmythtv/asistreamhandler.cpp

@@ -144,7 +144,7 @@ void ASIStreamHandler::run(void)
         return;
     }
 
-    DeviceReadBuffer *drb = new DeviceReadBuffer(this);
+    DeviceReadBuffer *drb = new DeviceReadBuffer(this, true, false);
     bool ok = drb->Setup(_device, _fd, _packet_size, _buf_size);
     if (!ok)
     {