Ticket #806: ringfd.diff

libs/libmythtv/RingBuffer.cpp

@@ -343 +343 @@
     unsigned errcnt = 0;
     unsigned zerocnt = 0;
 
+    if(fd < 0)
+       return 0;
+
     while (tot < sz)
     {
         ret = read(fd, (char *)data + tot, sz - tot);