Check the flush on the dht cache and history

good() ran before close(), so a failed write replaced the file.

src/core/dht_manager.cc

@@ -132,11 +132,12 @@ DhtManager::save_dht_cache() {
   torrent::Object cache = torrent::Object::create_map();
   cache_file << *torrent::runtime::network_manager()->dht_controller()->store_cache(&cache);
 
+  // The data only reaches the kernel here, so this is where a full disk is seen.
+  cache_file.close();
+
   if (!cache_file.good())
     return;
 
-  cache_file.close();
-
   ::rename(filename_tmp.c_str(), filename.c_str());
 }
 

src/ui/root.cc

@@ -467,6 +467,9 @@ Root::save_input_history() {
         history_file << entry << "|" + category.at((pitr->second + i) % m_input_history_length) + "\n";
   }
 
+  // The data only reaches the kernel here, so this is where a full disk is seen.
+  history_file.close();
+
   if (!history_file.good()) {
     lt_log_print(torrent::LOG_DEBUG, "input history file corrupted during writing, discarding (path:%s)", history_filename.c_str());
     return;
@@ -474,8 +477,6 @@ Root::save_input_history() {
     lt_log_print(torrent::LOG_DEBUG, "input history file written (path:%s)", history_filename.c_str());
   }
 
-  history_file.close();
-
   std::rename(history_filename_tmp.c_str(), history_filename.c_str());
 }