PVS-Studio warning V512 for iecsdk

void plt_tools_get_pl_config_full_file_name(char *buffer) {
  ...
  char temp[PL_MAX_PATH] = { '\0' };
  ...
  memset(
    temp,
    0,
    sizeof(buffer)
  );
  ...
}

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

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 'temp'. core_api_unit_tests unit_tests_tools.c 379

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/