Merged revisions 179671 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r179671 | file | 2009-03-03 10:38:09 -0400 (Tue, 03 Mar 2009) | 3 lines
  
  Move where fdno is set to the default value to *after* the read callback of the channel driver is called.
  We have to do this as the underlying channel driver may need the fdno value to determine what to read.
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@179672 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/channel.c

@@ -2489,12 +2489,6 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
 	}
 	prestate = chan->_state;
 
-	/* 
-	 * Reset the recorded file descriptor that triggered this read so that we can
-	 * easily detect when ast_read() is called without properly using ast_waitfor().
-	 */
-	chan->fdno = -1;
-
 	/* Read and ignore anything on the alertpipe, but read only
 	   one sizeof(blah) per frame that we send from it */
 	if (chan->alertpipe[0] > -1) {
@@ -2615,6 +2609,12 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
 			ast_log(LOG_WARNING, "No read routine on channel %s\n", chan->name);
 	}
 
+        /*
+	 * Reset the recorded file descriptor that triggered this read so that we can
+	 * easily detect when ast_read() is called without properly using ast_waitfor().
+	 */
+	chan->fdno = -1;
+
 	if (f) {
 		/* if the channel driver returned more than one frame, stuff the excess
 		   into the readq for the next ast_read call (note that we can safely assume