[Bug ada/124265] Dimension_System broken for subtypes and components with ranges

[liam at liampwll dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124265

--- Comment #1 from Liam Powell <liam at liampwll dot com> ---
Add an extra newline near the start of the testcase to make it pass. I
formatted that and forgot to change the line numbers.