PVS-Studio warning V636 for Coin3D

void
SbUTMProjection::project(....) const
{
  ....
  //Make sure the longitude is between -180.00 .. 179.9
  double LongTemp =
    (int(LongRad.deg())+180)-
    int((int(LongRad.deg())+180)/360)*360-180;
  ....
}

This suspicious code was found in Coin3D project by PVS-Studio static code analyzer.
Warning message is:
V636 The expression was implicitly casted from 'int' type to 'double' type. Consider utilizing an explicit type cast to avoid overflow. An example: double A = (double)(X) * Y;. sbutmprojection.cpp 56

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