[Fortran-caf] Fix stride calculation in libgfortran/caf/single.c

A rather obvious copy and paste error ... Committed as Rev. 210309. Tobias

Re: [Fortran-caf] Fix stride calculation in libgfortran/caf/single.c

For those with a broken crystal ball (and being too lazy to look in the repository), here's the attachment. Tobias Burnus: A rather obvious copy and paste error ... Committed as Rev. 210309. Index: libgfortran/ChangeLog.fortran-caf