[Patch] Fortran: intrinsic.texi add missing arg to FINDLOC (was: FINDLOC documentation at https://gcc.gnu.org/onlinedocs/gfortran/FINDLOC.html)

[Thomas Koenig]

Hi Tobias,

> I intent commit it as obvious, unless there are comments.

Just one nit: MASK does not have to be an array, it can
also be a scalar. It just has to be conformable.

OK with that change.

Best regards

	Thomas