[PATCH] Prevent a SEGV in MpegRecorder::run when encoding is stopped

[Lawrence Rust <lvr@…>]

If the current video source is a demo recorder and liveTV is exited then the BE aborts with a SEGV:

Program terminated with signal 11, Segmentation fault.
0  0xb67f4038 in MpegRecorder::run (this=0x8aa3b00) at mpegrecorder.cpp:1028
1028	                FD_SET(readfd, &rdset);
(gdb) bt
0  0xb67f4038 in MpegRecorder::run (this=0x8aa3b00) at mpegrecorder.cpp:1028
1  0xb5e186e0 in MThread::run (this=0x8a62060) at mthread.cpp:319
2  0xb5e18d34 in MThreadInternal::run (this=0x88cd100) at mthread.cpp:79
3  0xb3b772e0 in QThreadPrivate::start (arg=0x88cd100)
    at thread/qthread_unix.cpp:266
4  0xb3af9e99 in start_thread (arg=0xa0f39b70) at pthread_create.c:304
5  0xb39359ee in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
(gdb) print readfd
$1 = -1

This is the result of MpegRecorder::StopEncoding? closing 'readfd' and setting it to -1.

[Daniel Thor Kristjansson <danielk@…>]

In 661a1ddd71cfe5b24df72cd4585749a43af2f103/mythtv:

Fixes #10933. Don't close readfd from under MPEGRecorder::run()