Remove unnecessary code in ast_read as issue 16058 has been fully solved now.

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@243258 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/channel.c

@@ -2531,19 +2531,6 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio)
 		ast_frame_dump(chan->name, f, "<<");
 	chan->fin = FRAMECOUNT_INC(chan->fin);
 
-	if (f && f->frametype == AST_FRAME_CONTROL && f->subclass == AST_CONTROL_HOLD && f->datalen == 0 && f->data) {
-		/* fix invalid pointer */
-		f->data = NULL;
-#ifdef AST_DEVMODE
-		ast_log(LOG_ERROR, "Found HOLD frame with src '%s' on channel '%s' with datalen zero, but non-null data pointer!\n", f->src, chan->name);
-		ast_frame_dump(chan->name, f, "<<");
-#else
-		if (option_debug > 2) {
-			ast_log(LOG_DEBUG, "Found HOLD frame with src '%s' on channel '%s' with datalen zero, but non-null data pointer!\n", f->src, chan->name);
-		}
-#endif
-	}
-
 done:
 	ast_channel_unlock(chan);
 	return f;