bridge_native_rtp.c: Fix direct media video RTP instance ACL check.

The video stream was using the audio stream RTP instance addresses to
check if the video RTP gets directed to an allowed direct media Access
Control List (ACL) address.  There is no guarantee that the video RTP
instance uses the same addresses as the audio RTP instance.

This looks like it has been a bug since v11 when direct media ACL was
first added to chan_sip and then faithfully reproduced through a couple
code refactorings into the new bridging architecture.

Change-Id: I8ddd56320e0eea769f3ceed3fa5b6bdfb51d681a

bridges/bridge_native_rtp.c

@@ -184,10 +184,10 @@ static int rtp_glue_data_get(struct ast_channel *c0, struct rtp_glue_data *glue0
 		}
 	}
 	if (glue0->video.result == glue1->video.result && glue1->video.result == AST_RTP_GLUE_RESULT_REMOTE) {
-		if (glue0->cb->allow_vrtp_remote && !glue0->cb->allow_vrtp_remote(c0, glue1->audio.instance)) {
-			/* if the allow_vrtp_remote indicates that remote isn't allowed, revert to local bridge */
+		if (glue0->cb->allow_vrtp_remote && !glue0->cb->allow_vrtp_remote(c0, glue1->video.instance)) {
+			/* If the allow_vrtp_remote indicates that remote isn't allowed, revert to local bridge */
 			glue0->video.result = glue1->video.result = AST_RTP_GLUE_RESULT_LOCAL;
-		} else if (glue1->cb->allow_vrtp_remote && !glue1->cb->allow_vrtp_remote(c1, glue0->audio.instance)) {
+		} else if (glue1->cb->allow_vrtp_remote && !glue1->cb->allow_vrtp_remote(c1, glue0->video.instance)) {
 			glue0->video.result = glue1->video.result = AST_RTP_GLUE_RESULT_LOCAL;
 		}
 	}