patch 7.4.1447

Problem:    Memory leak when using ch_read(). (Dominique Pelle)
            No log message when stopping a job and a few other situations.
            Too many "Nothing to read" messages.  Channels are not freed.
Solution:   Free the listtv.  Add more log messages. Remove "Nothing to read"
            message.  Remove the channel from the job when its refcount
            becomes zero.

src/version.c

@@ -743,6 +743,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1447,
 /**/
     1446,
 /**/