[Bug fortran/112407] [13 Regression] Fix for PR37336 triggers an ICE in gfc_format_decoder while constructing a vtab

[trnka at scm dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112407

--- Comment #1 from Tomáš Trnka <trnka at scm dot com> ---
Created attachment 56516
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56516&action=edit
Hacky patch working around the issue on this testcase