Minor performance fix: only read static envvar once, not every time an SoSeparator is instantiated. Reported by Frank Hibbeln.
Minor performance fix: only read static envvar once, not every time an SoSeparator is instantiated. Reported by Frank Hibbeln.

Alexpux/Coin3D,Alexpux/Coin3D,Alexpux/Coin3D,Alexpux/Coin3D