PVS-Studio warning V501 for xpdfwin

static bool pi_next_rpcl(opj_pi_iterator_t * pi) {
  ...
  if ((res->pw==0)||(res->pw==0)) continue;

  ...
}

Most likely this is what should be written here: (res->pw==0)||(res->ph==0).

This suspicious code was found in xpdfwin project by PVS-Studio static code analyzer.
Warning message is:
V501 There are identical sub-expressions to the left and to the right of the '||' operator: ( res -> pw == 0 ) || ( res -> pw == 0 ) mupdf pi.c 219

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