Fixed a few leaks

plugins/janus_audiobridge.c

@@ -3166,6 +3166,7 @@ static void *janus_audiobridge_mixer_thread(void *data) {
 			fclose(audiobridge->recording);
 		}
 	}
+	g_free(rtpbuffer);
 	JANUS_LOG(LOG_VERB, "Leaving mixer thread for room %"SCNu64" (%s)...\n", audiobridge->room_id, audiobridge->room_name);
 
 	/* We'll let the watchdog worry about free resources */

plugins/janus_textroom.c

@@ -502,6 +502,9 @@ void janus_textroom_destroy(void) {
 	janus_mutex_lock(&sessions_mutex);
 	g_hash_table_destroy(sessions);
 	janus_mutex_unlock(&sessions_mutex);
+	janus_mutex_lock(&rooms_mutex);
+	g_hash_table_destroy(rooms);
+	janus_mutex_unlock(&rooms_mutex);
 	g_async_queue_unref(messages);
 	messages = NULL;
 	sessions = NULL;

plugins/janus_videoroom.c

@@ -920,7 +920,6 @@ void janus_videoroom_destroy(void) {
 	janus_mutex_unlock(&sessions_mutex);
 
 	janus_mutex_lock(&rooms_mutex);
-
 	g_hash_table_destroy(rooms);
 	rooms = NULL;
 	janus_mutex_unlock(&rooms_mutex);

sdp-utils.c

@@ -52,6 +52,7 @@ void janus_sdp_free(janus_sdp *sdp) {
 			janus_sdp_attribute_destroy(a);
 			temp2 = temp2->next;
 		}
+		g_list_free(m->attributes);
 		g_free(m);
 		temp = temp->next;
 	}