Fixes compilation of BlackoilPropertiesFromDeck.cpp.

Patch 31c09aed was erroneous as it was trying to assing a
SaturationPropsFromDeck<SatFuncSimpleNonuniform> to a
SaturationPropsFromDeck<SatFuncSimpleUniform> in the constructor
taking the new parser. This patch fixes this.
Merge pull request #528 from blattms/fix-nonunifom

Fixes compilation of BlackoilPropertiesFromDeck.cpp.