message: Fix a potential UBSAN error.
  We only use that value as uint64_t below anyway.
diff: @@ -269,7 +269,7 @@ void setSize( Mat& m, int _dims, const int* _sz, const size_t* _steps, bool auto
  else if( autoSteps )
  {
  m.step.p[i] = total;
  - int64 total1 = (int64)total*s;
  + uint64 total1 = (uint64)total*s;
  if( (uint64)total1 != (size_t)total1 )
  CV_Error( CV_StsOutOfRange, "The total matrix size does not fit to \"size_t\" type" );
  total = (size_t)total1;
  