gsFieldCreator: gsAbsError added option to use a function f2 defined on the parameter space
gsFieldCreator: gsAbsError added option to use a function f2 defined on the parameter space

git-svn-id: 6b1c4fe79111c0bc0cce83313250759594f8984b@9575 e128ff1e-fa79-4151-a8cb-522299a2c450

filiatra/gismo,filiatra/gismo