PVS-Studio warning V501 for Fennec Media Project

int fennec_tag_item_compare(struct fennec_audiotag_item *a,
  struct fennec_audiotag_item *b)
{
  int v;
  if(a->tsize && a->tsize)
    v = abs(str_cmp(a->tdata, a->tdata));
  else
    v = 1;
  return v;
}

This suspicious code was found in Fennec Media Project 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: a -> tsize && a -> tsize media library.c 1076

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/