PVS-Studio warning V512 for iecsdk

typedef struct _plh_dynamic_pl_folder_info {
...
} PLH_DYNAMIC_PL_FOLDER_INFO, *PPLH_DYNAMIC_PL_FOLDER_INFO;

int plh_dynamic_read_pl_folder(
  PPLH_DYNAMIC_PL_FOLDER_INFO pconfig)
{
  ...
  memset(
    pconfig,
    0,
    sizeof(pconfig)
  );
  ...
}

This is what should have been written here: sizeof(*pconfig)

This suspicious code was found in iecsdk project by PVS-Studio static code analyzer.
Warning message is:
V512 A call of the 'memset' function will lead to underflow of the buffer 'pconfig'. pl_csv_logger productivity_link_helper.c 1806

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