pspp_coeff_var_to_coeff: Guard against a null pointer in coefs[i]->v_info.
[pspp] / tests / expressions /
drwxr-xr-x   ..
-rwxr-xr-x 7607 epoch.sh
-rwxr-xr-x 64540 expressions.sh
-rwxr-xr-x 1521 randist.sh
drwxr-xr-x - randist
-rwxr-xr-x 1966 valuelabel.sh
-rwxr-xr-x 2585 variables.sh
-rwxr-xr-x 1949 vectors.sh