Add support for relaying early media in the features attended transfer option.

(closes issue #14828)
Reported by: licedey


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@224773 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_features.c

@@ -1480,10 +1480,12 @@ static struct ast_channel *ast_feature_request_and_dial(struct ast_channel *call
 							f = NULL;
 							ready=1;
 							break;
-						} else if (f->subclass != -1) {
+						} else if (f->subclass != -1 && f->subclass != AST_CONTROL_PROGRESS) {
 							ast_log(LOG_NOTICE, "Don't know what to do about control frame: %d\n", f->subclass);
 						}
 						/* else who cares */
+					} else if (f->frametype == AST_FRAME_VOICE || f->frametype == AST_FRAME_VIDEO) {
+						ast_write(caller, f);
 					}
 
 				} else if (caller && (active_channel == caller)) {
@@ -1515,6 +1517,8 @@ static struct ast_channel *ast_feature_request_and_dial(struct ast_channel *call
 							f = NULL;
 							break;
 						}
+					} else if (f->frametype == AST_FRAME_VOICE || f->frametype == AST_FRAME_VIDEO) {
+						ast_write(chan, f);
 					}
 				}
 				if (f)