Merged revisions 66437 via svnmerge from

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

........
r66437 | file | 2007-05-29 12:44:34 -0400 (Tue, 29 May 2007) | 2 lines

Handle cases where a frame may have no data. (issue #9519 reported by dmb)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@66438 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/rtp.c

@@ -2862,7 +2862,7 @@ int ast_rtp_write(struct ast_rtp *rtp, struct ast_frame *_f)
 			ast_smoother_feed(rtp->smoother, _f);
 		}
 
-		while ((f = ast_smoother_read(rtp->smoother)))
+		while ((f = ast_smoother_read(rtp->smoother)) && (f->data))
 			ast_rtp_raw_write(rtp, f, codec);
 	} else {
 	        /* Don't buffer outgoing frames; send them one-per-packet: */
@@ -2870,7 +2870,8 @@ int ast_rtp_write(struct ast_rtp *rtp, struct ast_frame *_f)
 			f = ast_frdup(_f);	/*! \bug XXX this might never be free'd. Why do we do this? */
 		else
 			f = _f;
-		ast_rtp_raw_write(rtp, f, codec);
+		if (f->data)
+			ast_rtp_raw_write(rtp, f, codec);
 		if (f != _f)
 			ast_frfree(f);
 	}