Fixed wait_for_topic and orb_exists

orb_exists was not updating the DSP topics on apps proc side

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

src/modules/muorb/adsp/px4muorb.cpp

@@ -158,6 +158,7 @@ int px4muorb_param_update_value_from_shmem(uint32_t param, const uint8_t *value,
 	release_shmem_lock(__FILE__, __LINE__);
 
 	return 0;
+}
 
 int px4muorb_topic_advertised(const char *topic_name)
 {

src/modules/uORB/uORBManager.cpp

@@ -137,7 +137,7 @@ int uORB::Manager::orb_exists(const struct orb_metadata *meta, int instance)
 #else
 	ret = px4_access(path, F_OK);
 	if (ret == -1 && meta != nullptr && _remote_topics.size() > 0) {
-		ret = (_remote_topics.find(meta->o_name) != _remote_topics.end());
+		ret = (_remote_topics.find(meta->o_name) != _remote_topics.end()) ? OK : ERROR;
 	}
 	return ret;
 #endif