Gracefully handle new fwd-sim parameter

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

4_grains/gtCalculateGrain.m

@@ -39,12 +39,6 @@ if (~exist('parameters', 'var') || isempty(parameters))
     parameters = gtLoadParameters();
 end
 
-switch parameters.fsim.mode
-    case 'global_fit'
-        usestrain = true;
-    otherwise
-        usestrain = false;
-end
 % set default values for optional arguments
 app.color      = false;
 app.showfigure = false;
@@ -52,7 +46,7 @@ app.axis       = false;
 app.markersize = 25;
 app.overlay    = []; % zeros(parameters.acq.ydet, parameters.acq.xdet);
 app.variants   = false;
-app.usestrain  = usestrain;
+app.usestrain  = isfield(parameters.fsim, 'mode') && strcmpi(parameters.fsim.mode, 'global_fit');
 app.included   = [];
 app.ref_omind  = [];
 app.det_ind    = [];

4_grains/gtCalculateGrain_p.m

@@ -46,12 +46,7 @@ end
 if (~exist('parameters','var') || isempty(parameters))
     parameters = gtLoadParameters();
 end
-switch parameters.fsim.mode
-    case 'global_fit'
-        usestrain = true;
-    otherwise
-        usestrain = false;
-end
+
 % set default values for optional arguments
 app.color      = false;
 app.showfigure = false;
@@ -59,7 +54,7 @@ app.axis       = false;
 app.markersize = 10;
 app.clims      = [-300 500];
 app.overlay    = []; % zeros(parameters.acq.ydet, parameters.acq.xdet);
-app.usestrain  = usestrain;
+app.usestrain  = isfield(parameters.fsim, 'mode') && strcmpi(parameters.fsim.mode, 'global_fit');
 app.included   = [];
 app.ref_omind  = [];
 app.det_ind    = [];