Modified return_r1_data() function, to return numpy array of "None", if model is in list of "MODEL_LIST_R1RHO_FIT_R1".
sr #3135(https://gna.org/support/?3135): Optimisation of the R1 relaxation rate for the off-resonance R1rho relaxation dispersion models.
Authored by: tlinnet 2014-08-04
Parent: [r24926]
Child: [r24928]
