Support using buffered I/O with O_SYNC instead of direct I/O

src/disk_tool_resize.cpp

@@ -91,6 +91,7 @@ int disk_tool_t::resize_parse_params()
     try
     {
         dsk.parse_config(options);
+        dsk.cached_io_data = dsk.cached_io_meta = dsk.cached_io_journal = false;
         dsk.open_data();
         dsk.open_meta();
         dsk.open_journal();