[Bug libfortran/61499] [4.9/4.10 Regression] Internal read of negative integer broken

[krefson at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61499

--- Comment #9 from Keith Refson <krefson at gmail dot com> ---
This fix checks out for the full code in context as well as the boiled-down
example. Happy for this to be closed.