Dear all,

the passing of procedure arguments in Fortran sometimes requires
ancillary parameters that are "hidden".  Examples are string length
and the presence status of scalar variables with optional+value
attribute.

The gfortran ABI is actually documented:

https://gcc.gnu.org/onlinedocs/gfortran/Argument-passing-conventions.html

The reporter found that there was a discrepancy between the
caller and the callee.  This is corrected by the attached patch.

Regtested on x86_64-pc-linux-gnu.  OK for mainline?

Thanks,
Harald