[Patch, fortran] PR109684 - compiling failure: complaining about a final subroutine of a type being not PURE (while it is indeed PURE)

[Paul Richard Thomas via Gcc-patches]

Committed to trunk as 'obvious' in
r14-3098-gb8ec3c952324f866f191883473922e250be81341

13-branch to follow in a few days.

Paul