PVS-Studio warning V517 for MAME

static WRITE8_HANDLER( tms70x0_pf_w )
{
  ...
  if( ((cpustate->pf[0x03] & 0x80) == 0) &&
      ((data & 0x80) == 0x80 ) )
  {
    ...
  }
  else if( ((data & 0x80) == 0x80 ) &&
           ((cpustate->pf[0x03] & 0x80) == 0) )
  {
    ...
  }
  ...
}

This suspicious code was found in MAME project by PVS-Studio static code analyzer.
Warning message is:
V517 The use of 'if (A) {...} else if (A) {...}' pattern was detected. There is a probability of logical error presence. Check lines: 577, 584.  tms7000.c 577

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