AP_Proximity: cope with AP_AVOIDANCE_ENABLED being false

libraries/AP_Proximity/AP_Proximity_Backend.cpp

@@ -88,7 +88,7 @@ bool AP_Proximity_Backend::ignore_reading(float pitch, float yaw, float distance
 // returns true if database is ready to be pushed to and all cached data is ready
 bool AP_Proximity_Backend::database_prepare_for_push(Vector3f &current_pos, Matrix3f &body_to_ned)
 {
-#if !APM_BUILD_TYPE(APM_BUILD_AP_Periph)
+#if AP_OADATABASE_ENABLED
     AP_OADatabase *oaDb = AP::oadatabase();
     if (oaDb == nullptr || !oaDb->healthy()) {
         return false;