PVS-Studio warning V547 for Ultimate ToolBox

int m_nCurrentIndex;
...
BOOL COXProcessIterator::Prev(UINT nOffset)
{
  ...
  if(m_nCurrentIndex-nOffset<0)
    return FALSE;
  ...
}

Since the "m_nCurrentIndex-nOffset" expression has the unsigned type, it can never be below 0.

This suspicious code was found in Ultimate ToolBox project by PVS-Studio static code analyzer.
Warning message is:
V547 Expression 'm_nCurrentIndex - nOffset < 0' is always false. Unsigned type value is never < 0. UT oxprocess.cpp 594

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