(issue1754) Better fix for radius calculation then 8607:2010da0904b7 Checking for that lower < upper is guranteed in radius calculation makes more sense to do centrally in ZoomScale. This also works for the MINFO Filter facets.

SYMBOLSET
SYMBOL
  NAME 'point'
  TYPE ELLIPSE
  POINTS
    1 1
  END
  FILLED TRUE
END
SYMBOL
  NAME "square"
  TYPE VECTOR
  POINTS
    0 0
    0 1
    1 1
    1 0
    0 0
  END
  FILLED TRUE
END
END