PVS-Studio warning V547 for Scilab

#define __GO_FIGURE__ 9
#define __GO_UIMENU__ 21

int sci_uimenu(char *fname, unsigned long fname_len)
{
  ....
  if (iParentType == __GO_FIGURE__ &&
      iParentType == __GO_UIMENU__)
  {
    Scierror(999, _("%s: Wrong type for input argument #%d: ")
             _("A '%s' or '%s' handle expected.\n"),
             fname, 1, "Figure", "Uimenu");
    return FALSE;
  }
  ....
}

This is what should have been written here: iParentType != __GO_FIGURE__ && iParentType != __GO_UIMENU__

This suspicious code was found in Scilab project by PVS-Studio static code analyzer.
Warning message is:
V547 Expression 'iParentType == 9 && iParentType == 21' is always false. Probably the '||' operator should be used here. sci_uimenu.c 99

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