[Bug fortran/58023] [F03] ICE on invalid with bad PPC declaration

[janus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58023

--- Comment #7 from janus at gcc dot gnu.org ---
I have finally committed the patch in comment 2 (sorry that it took so long).

The ICE on comment 0 is still there, but for consistency one should do a bit
more than shown in comment 5. Will take care of that next.