In module for estimating R2eff errors, removed " values, errors" to be send to function for gradient, since they are not used.
task #7822(https://gna.org/task/index.php?7822): Implement user function to estimate R2eff and associated errors for exponential curve fitting.
Authored by: tlinnet 2014-08-31
Parent: [r25474]
Child: [r25476]
