compiler -Wuse-after-free warning

[joachimmetz]

logical_fs.cpp:728:37: warning: pointer used after 'void free(void*)' [-Wuse-after-free]
  728 |                 tsk_error_set_errstr("load_path_from_inum - failed to find path corresponding to inum %" PRIuINUM, search_helper->target_inum);
      |                 ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In function 'void free_search_helper(LOGICALFS_SEARCH_HELPER*)',
    inlined from 'TSK_TCHAR* load_path_from_inum(LOGICALFS_INFO*, TSK_INUM_T)' at logical_fs.cpp:725:21:
logical_fs.cpp:166:13: note: call to 'void free(void*)' here
  166 |         free(helper);
      |         ~~~~^~~~~~~~

[joachimmetz]

Still persists in 7f94769