[Clas_cascades] st offset in ffread

[Zhiwen Zhao]

Dear Eg3er

I notice that the st offset in CALDB is -45.06
But it's -41 in our general ffread file, eg. 
http://clasweb.jlab.org/rungroups/eg3/wiki/index.php/Ffread_file_for_xi-pi-
Is that a mistake or something else?

Thanks

Zhiwen