Prevent unnecessary warnings when getting rtpsource or rtpdest.

If a recognized media type was present, but the media type was not
enabled for the channel, then a warning would be emitted. For instance,
attempting to get CHANNEL(rtpsource,video) on a call with no video would
cause a warning message to appear.

With this change, the warning will only appear if the stream argument
is not recognized as being a media type that can be specified.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@261313 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/sip/dialplan_functions.c

@@ -91,8 +91,9 @@ int sip_acf_channel_read(struct ast_channel *chan, const char *funcname, char *p
 		else
 			return -1;
 
+		/* Return 0 to suppress a console warning message */
 		if (!stream) {
-			return -1;
+			return 0;
 		}
 
 		ast_rtp_instance_get_remote_address(stream, &sin);
@@ -113,8 +114,9 @@ int sip_acf_channel_read(struct ast_channel *chan, const char *funcname, char *p
 		else
 			return -1;
 
+		/* Return 0 to suppress a console warning message */
 		if (!stream) {
-			return -1;
+			return 0;
 		}
 
 		ast_rtp_instance_get_local_address(stream, &sin);