PVS-Studio warning V501 for blender

static PyObject *bpy_bmlayercollection_subscript_slice(
  BPy_BMLayerCollection *self,
  Py_ssize_t start, Py_ssize_t stop)
{
  ...
  if (start >= start) start = len - 1;
  if (stop >= stop)   stop  = len - 1;
  ...
}

This suspicious code was found in blender 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: start >= start bf_python_bmesh bmesh_py_types_customdata.c 442

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