core_unreal: Only block media frames when a generator is on both ends of an unreal channel.

The fix for ASTERISK-12292 was a bit too aggressive.  You could have
generators pointed at each other on local channels but need to get other
kinds of frames such as DTMF or CONNECTED_LINE frames accross.
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Merged revisions 414269 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 414270 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 414272 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@414297 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/core_unreal.c

@@ -211,8 +211,11 @@ static int unreal_queue_frame(struct ast_unreal_pvt *p, int isoutbound, struct a
 		return 0;
 	}
 
-	/* do not queue frame if generator is on both unreal channels */
-	if (us && ast_channel_generator(us) && ast_channel_generator(other)) {
+	/* do not queue media frames if a generator is on both unreal channels */
+	if (us
+		&& (f->frametype == AST_FRAME_VOICE || f->frametype == AST_FRAME_VIDEO)
+		&& ast_channel_generator(us)
+		&& ast_channel_generator(other)) {
 		return 0;
 	}