re PR fortran/34359 (ICE in December 6 version of gfortran when compiling a file with two routines that contain INCLUDE statements)
PR fortran/34359
* gfortran.h (gfc_file): Remove sibling and down fields.
* scanner.c (file_changes, file_changes_cur, file_changes_count,
file_changes_allocated): New variables.
(add_file_change, report_file_change): New functions.
(change_file): Remove.
(gfc_start_source_files, gfc_end_source_files): Call
report_file_change instead of change_file.
(gfc_advance_line): Call report_file_change instead of change_file,
call it even if lb->file == lb->next->file.
(get_file): Revert last changes.
(preprocessor_line): Call add_file_change when entering or leaving
a file.
(load_file): Likewise. Set file_change[...].lb for all newly added
file changes.
* gfortran.dg/include_1.f90: New test.
* gfortran.dg/include_1.inc: New.
* gfortran.dg/include_2.f90: New test.
From-SVN: r130712
