PVS-Studio warning V519 for tesseract-ocr

inT32 row_words2(....)
{
  ....
  this_valid = blob_box.width () >= min_width;
  this_valid = TRUE;
  ....
}

This suspicious code was found in tesseract-ocr project by PVS-Studio static code analyzer.
Warning message is:
V519 The 'this_valid' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 396, 397. libtesseract303 wordseg.cpp 397

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/