PVS-Studio warning V612 for Firebird

SLONG LockManager::queryData(....)
{
  ....
  for (const srq* lock_srq =
         (SRQ) SRQ_ABS_PTR(data_header.srq_backward);
     lock_srq != &data_header;
     lock_srq = (SRQ) SRQ_ABS_PTR(lock_srq->srq_backward))
  {
    const lbl* const lock = ....;
    CHECK(lock->lbl_series == series);
    data = lock->lbl_data;
    break;
  }
  ....
}

This suspicious code was found in Firebird project by PVS-Studio static code analyzer.
Warning message is:
V612 An unconditional 'break' within a loop. lock.cpp 965

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/