(report_error_function): Don't attempt to use input file stack to
identify nesting of #include's if file name oflocation diagnosed is
not same as input_filename.
From-SVN: r10271
(*print_error_function) (file);
if (input_file_stack && input_file_stack->next != 0
- && input_file_stack_tick != last_error_tick)
+ && input_file_stack_tick != last_error_tick
+ && file == input_filename)
{
fprintf (stderr, "In file included");
for (p = input_file_stack->next; p; p = p->next)