don't throw error on fail

src/client/creatures.cpp

@@ -379,7 +379,6 @@ SpawnPtr CreatureManager::getSpawnForPlacePos(const Position& pos)
             return spawn;
     }
 
-    g_logger.debug(stdext::format("failed to find spawn at %s", stdext::to_string(pos)));
     return nullptr;
 }
 

src/client/mapio.cpp

@@ -280,8 +280,8 @@ void Map::saveOtbm(const std::string& fileName)
 
             root->startNode(OTBM_MAP_DATA);
             {
-                // own description.
-                for(const auto& desc : getDescriptions()) {
+                const auto& descvec = getDescriptions();
+                for(const auto& desc : descvec) {
                     root->addU8(OTBM_ATTR_DESCRIPTION);
                     root->addString(desc);
                 }