PVS-Studio warning V529 for CamStudio

psd_static void psd_art_svp_render_aa_iter_step(....)
{
  ....
  /* move cursor to topmost vector which overlaps [y,y+1) */
  for(curs = 0; seg->points[curs + 1].y < y; curs++);
    cursor[i] = curs;
  ....
}

This suspicious code was found in CamStudio project by PVS-Studio static code analyzer.
Warning message is:
V529 Odd semicolon ';' after 'for' operator. boundary.c 3100

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/