Remove unnecessary call to string()

src/blockchain_db/lmdb/db_lmdb.cpp

@@ -1357,7 +1357,7 @@ static bool disable_ntfs_compression(const boost::filesystem::path& filepath)
 
   USHORT compression_state = COMPRESSION_FORMAT_NONE;
   DWORD bytes_returned;
-  BOOL ok = DeviceIoControl(
+  BOOL ok = ::DeviceIoControl(
     file_handle,
     FSCTL_SET_COMPRESSION,
     &compression_state,            
@@ -1368,7 +1368,7 @@ static bool disable_ntfs_compression(const boost::filesystem::path& filepath)
     nullptr                         
   );
 
-  CloseHandle(file_handle);
+  ::CloseHandle(file_handle);
   return ok;
 }
 #endif
@@ -1405,7 +1405,7 @@ void BlockchainLMDB::open(const std::string& filename, const int db_flags)
     LOG_PRINT_L0("Failed to disable NTFS compression on folder: " << filename << ". Error: " << ::GetLastError());
   boost::filesystem::path datafile(filename);
   datafile /= CRYPTONOTE_BLOCKCHAINDATA_FILENAME;
-  boost::filesystem::ofstream(datafile.string()).close(); // touch the file to ensure it exists
+  boost::filesystem::ofstream(datafile).close(); // touch the file to ensure it exists
   if (!disable_ntfs_compression(datafile)) 
     throw DB_ERROR("Database file is NTFS compressend and compression could not be disabled");
 #endif