PVS-Studio warning V614 for TPP

int main(int argc, char** argv) {
  ....
  ramp_fileoffset_t *pScanIndex;
  ....
  if ( (pFI=rampOpenFile(mzXmlPath_.c_str()))==NULL) {
    ....
  } else {
    ....
    pScanIndex = readIndex(pFI, indexOffset,
                           &iAnalysisLastScan );
    ....
  }
  ....
  if (pScanIndex != NULL)
    free(pScanIndex);

  return 0;
}

This suspicious code was found in TPP project by PVS-Studio static code analyzer.
Warning message is:
V614 Potentially uninitialized pointer 'pScanIndex' used. sqt2xml.cxx 476

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/