set J_test field to empty in case of just or underidentified case

Prevents crash (cherry picked from commit b9d069da)

set J_test field to empty in case of just or underidentified case
dd7f58c1 · Johannes Pfeifer · Sébastien Villemot · b0c27f4d · dd7f58c1
Verified Commit dd7f58c1 authored 1 year ago by Johannes Pfeifer Committed by Sébastien Villemot 1 year ago
--- a/matlab/+mom/Jtest.m
+++ b/matlab/+mom/Jtest.m
@@ -70,4 +70,6 @@ if options_mom_.mom.mom_nbr > length(xparam)
    J_test.p_val           = 1-chi2cdf(J_test.j_stat, J_test.degrees_freedom);
    fprintf('\nValue of J-test statistic: %f\n',J_test.j_stat);
    fprintf('p-value of J-test statistic: %f\n',J_test.p_val);
+else
+    J_test=[];
 end
\ No newline at end of file