o-space bbox determination: enabled using eta constraint

Signed-off-by: Nicola Vigano <nicola.vigano@esrf.fr>

zUtil_Deformation/GtOrientationSampling.m

@@ -291,7 +291,7 @@ classdef GtOrientationSampling < handle
                 use_corners = true;
             end
             if (~exist('use_etas', 'var') || isempty(use_etas))
-                use_etas = false;
+                use_etas = true;
             end
 
             omega_step = gtGetOmegaStepDeg(self.parameters, self.detector_index);