Fix for calculating the theta angle describing the tilted rotating frame relative to the laboratory, when omega1 / Delta_omega is negative.
Regarding sr #3124, (https://gna.org/support/index.php?3124) - Grace graphs production for R1rho analysis with R2_eff as function of Omega_eff.
This follows discussion in: http://thread.gmane.org/gmane.science.nmr.relax.devel/5205.
Authored by: tlinnet 2014-03-14
Parent: [r22479]
Child: [r22481]
